鄂尔多斯盆地姬塬地区长8致密储层溶蚀作用及其对储层孔隙的定量影响

doi:10.11764/j.issn.1672-1926.2018.10.008

天然气地球科学

鄂尔多斯盆地姬塬地区长8致密储层溶蚀作用及其对储层孔隙的定量影响

李树同，姚宜同，乔华伟，惠潇，程党性，张文选，牟炜卫

1.甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室，甘肃兰州 730000; 2.成都理工大学沉积地质研究院，四川成都 610059; 3.中国石油长庆油田公司第三采油厂，宁夏银川 750006； 4.中国石油长庆油田公司勘探开发研究院，陕西西安 710021；5.中国科学院大学，北京 100049

收稿日期:2018-08-01 修回日期:2018-09-28 出版日期:2018-12-10
通讯作者: 牟炜卫（1991-），男，甘肃临洮人，博士研究生，主要从事沉积学及油气地质学研究. E-mail:mouweiwei1020@l63.com.
作者简介:李树同（1979-），男，甘肃会宁人，副研究员，博士，主要从事沉积学及油气地质学研究.E-mail：lishutong1979@163.com.
基金资助:
国家自然科学基金面上项目（编号：41772142）；中国科学院兰州油气资源研究中心“十三五”创新基金（编号：135CCJJ20160510）联合资助.

Dissolution of Chang 8 tight reservoir and its quantitative influence on porosity in Jiyuan area,Ordos Basin

Li Shu-tong,Yao Yi-tong,Qiao Hua-wei,Hui Xiao,Cheng Dang-xing,Zhang Wen-xuan,Mou Wei-wei

1.Key Laboratory of Petroleum Resources,Gansu Province/Key Laboratory of Petroleum Resources Research，Institute of Geology and Geophysics，Chinese Academy of Sciences,Lanzhou 730000,China; 2.Institute of Sedimentary Geology，Chengdu University of Technology，Chengdu 610059，China; 3.The Third Oil Production Plant of Changqing Oil Field Company,Petrochina,Yinchuan 750006,China; 4.Exploration and Development Research Institution,Changqing Oilfield Company,Xi’an 710021,China; 5.University of Chinese Academy of Sciences,Beijing 100049,China

Received:2018-08-01 Revised:2018-09-28 Online:2018-12-10

摘要/Abstract

摘要： 鄂尔多斯盆地姬塬地区长8储层中长石含量较高，且普遍存在长石溶蚀现象，对致密储层物性的改善具有重要意义。在对长8致密储层特征的研究基础上，利用高温高压流体—岩石相互作用模拟实验，并结合偏光显微镜、扫描电镜（SEM）和X-射线衍射（XRD）等分析技术，模拟研究区长8储层岩石样品与有机酸的相互作用，分析了溶蚀作用类型及其特征，并解释了相关溶蚀作用机理，定量计算了溶蚀作用对储层孔隙度的影响。为使模拟实验更接近实际地质情况，流体采用0.15mol/L、pH=2.65的乙酸溶液，模拟温度为87~103℃，模拟压力为24.70~30.18MPa。研究表明：长8储层主要岩石孔隙类型为原生粒间孔和长石溶蚀孔，其中长石溶蚀孔较发育，占总孔隙的39%左右，计算得其视溶蚀率为37.8%~50.0%，呈中等溶蚀程度；长石类和碳酸盐类矿物在酸性条件下均能发生不同程度的溶蚀，碳酸盐类矿物的相对溶蚀率整体大于长石类矿物的相对溶蚀率；在95℃左右时矿物的溶蚀作用最为明显，依据地温梯度计算其对应的埋藏深度约为2 370~2 710m，该深度可能是长8储层中有利储层的主要分布区域；溶蚀作用导致长8致密储层的孔隙度增加约3.57%~3.69%，其平均孔隙度增加3.63%，溶蚀作用是研究区长8储层孔隙度增加的关键成岩作用类型，是储层“甜点”发育的主要控制因素。

关键词: 致密储层, 溶蚀作用\流体—岩石相互作用, 模拟实验, 长8储层, 姬塬地区

Abstract: Chang 8 reservoir in Jiyuan area of Ordos Basin holds characteristics of high feldspar content and common feldspar dissolution phenomenon,which is important to improve the physical properties of tight reservoirs.On the basis of identifying the basic characteristics of Chang 8 tight reservoir,utilizing the simulation experiment of fluid-rock interaction with high temperature and high pressure,combined with polarized microscope and scanning electron microscope(SEM) and X-ray diffraction(XRD) analysis techniques,this paper simulates the interaction between Chang 8 reservoir rock samples and organic acid,analyzes the types and characteristics of dissolution,explains the dissolution mechanism and quantitatively calculates the influence of dissolution on porosity of reservoir.In order to make the simulation experiment more close to the actual geological conditions,0.15mol/L acetic acid solution with pH=2.65 is used as reaction fluid.The simulation temperature range is set to 87-103℃ and the simulated pressure range is set to 24.70-30.18MPa.The research result shows that intergranular pores and feldspar dissolved pores are the main pore types,of which the feldspar dissolved pores are more developed and accounts for 39% of the total porosity.The apparent solution ratio is 37.8% to 50.0% with moderate degree of dissolution.In addition,carbonate minerals can also be dissolved under acidic condition.The relative solution ratio of carbonate minerals generally exceeds feldspar.The dissolution degree is strongest at about 95℃ and the burial depth is about 2 370-2 710m by the geothermal gradient calculation,which should be the main distribution area of favorable reservoir of Chang 8.Overall,dissolution is the main diagenesis types to improve the porosity and result in the 3.57%-3.69% increase of porosityin tight reservoirs of Chang 8.Therefore,it is also the main controlling factor for the development of “dessert” in Chang 8 tight reservoir of western Jiyuan area.

Key words: Tight reservoir, Dissolution, Fluid-rock interaction, Simulation experiment, Chang 8 reservoir, Jiyuan area

中图分类号:

TE122.1

李树同, 姚宜同, 乔华伟, 惠潇, 程党性, 张文选, 牟炜卫. 鄂尔多斯盆地姬塬地区长8致密储层溶蚀作用及其对储层孔隙的定量影响[J]. 天然气地球科学, 2018, 28(12): 1727–1738.

Li Shu-tong, Yao Yi-tong, Qiao Hua-wei, Hui Xiao, Cheng Dang-xing, Zhang Wen-xuan, Mou Wei-wei. Dissolution of Chang 8 tight reservoir and its quantitative influence on porosity in Jiyuan area,Ordos Basin[J]. Natural Gas Geoscience, 2018, 28(12): 1727–1738.

参考文献

［1］Jia Chengzao,Zou Caineng,Li Jianzhong,et al.Assessment criteria,main types,basic features and resource prospects of the tight oil in China[J].Acta Petrolei Sinica,2012，33(3):343-349.
[ZK(3#]贾承造，邹才能，李建忠，等.中国致密油评价标准、主要类型、基本特征及资源前景[J].石油学报，2012，2012,33(3)：343-349.
[2]Zou Caineng,Zhu Rukai,Wu Songtao,et al.Types,characteristics genesis and prospects of conventional and unconventional hydrocarbon accumulations:Taking tight oil and tight gas in China as an instance[J].Acta Petrolei Sinica,2012,33(2):173-187.
邹才能，朱如凯，吴松涛，等.常规与非常规油气聚集类型、特征、机理及展望——以中国致密油和致密气为例[J].石油学报，2012，33(2)：173-186．
[3]Yang Hua,Li Shixiang,Liu Xianyang.Characteristics and resource prospects of tight oil and shale oil in Ordos Basin[J].Acta Petrolei Sinica,2013,34(1):1-11.
杨华，李士祥，刘显阳.鄂尔多斯盆地致密油、页岩油特征及资源潜力[J].石油学报，2013，34(1)：1-11．
[4]Wang Congxiao,Luo Qun,Song Yan,et al.Nano-meter petroleum geology:Discussion about geology theory and research method of unconventional petroleum[J].Petroleum Geology and Experiment,2014,36(6):660-667.
王崇孝，罗群，宋岩，等.纳米石油地质学—非常规油气地质理论与研究方法探讨[J].石油实验地质，2014，36(6)：660-667.
[5]Surdam R C,Boese S W,Crossey L J.The chemistry of secondary porosity[J].AAPG Memoir,1984,37(2):183-200.
[6]Macgowan D B,Fischer K J,Surdam R C.Alumino-silicate dissolution in the subsurface:Experimental simulation of a specific geologic environment[J].AAPG Bulletin,1986,70(8):1048-1048.
[7]Fisher J B,Boles J R.Water-rock interaction in Tertiary sandstones,San Joaquin Basin,California,U.S.A.:Diagenetic controls on water composition[J].Chemical Geology,1990,82(1/2):83-101.
[8]Huang Kangjun,Wang Wei,Bao Zhengyu,et al.Dissolution and alteration of Feixianguan Formation in the Sichuan Basin by organic acid fluids under burial condition:Kinetic dissolution experiments[J].Geochimica,2011,40(3):289-300.
黄康俊，王炜，鲍征宇，等.埋藏有机酸性流体对四川盆地东北部飞仙关组储层的溶蚀改造作用：溶解动力学实验研究[J].地球化学，2011，40(3)：289-300.
[9]She Min,Shou Jianfeng,Shen Anjiang,et al.Experimental simulation of dissolution and alteration of buried organic acid fluid on dolomite reservoir[J].Journal of China University of Petroleum,2014,38(3):10-17.
佘敏，寿建峰，沈安江，等.埋藏有机酸性流体对白云岩储层溶蚀作用的模拟实验[J].中国石油大学学报:自然科学版，2014，38(3)：10-17.
[10]Guo Chunqing,Shen Zhongmin,Zhang Linye,et al.The corrosion and its mechanism of organic acids on main minerals in oil-gas reservoir sand rocks[J].Geology Geochemistry,2003,31(3):53-57.
郭春清，沈忠民，张林晔，等.砂岩储层中有机酸对主要矿物的溶蚀作用及机理研究综述[J].地质地球化学，2003，31(3)：53-57.
[11]Yu Chuanqi,Song Xiaojiao,Li JingJing,et al.Impact of feldspar dissolution on reservoir physical properties:A case from Dongying Sag,the Bohai Bay Basin[J].Oil & Gas Geology,2013,34(6):765-770.
于川淇，宋晓蛟，李景景，等．长石溶蚀作用对储层物性的影响-以渤海湾盆地东营凹陷为例[J].石油与天然气地质，2013，34(6)：765-770．
[12]Hu Haiyan.Effects of hydrocarbon emplacement to diagenesis of reservoirs[J].Marine Origin Petroleum Geology,2004，39(1/2):85-90.
胡海燕.油气充注对成岩作用的影响[J].海相油气地质，2004，39(1/2)：85-90.
[13]Huang Jie,Zhu Rukai,Hou Dujie,et al.The new advances of secondary porosity genesis mechanism in deep clastic reservoir[J].Geological Science and Technology Information,2007，26(6):76-82.
黄洁，朱如凯，侯读杰，等．深部碎屑岩储层次生孔隙发育机理研究进展[J].地质科技情报，2007，26(6)：76-82．
[14]Zhu Dongya,Jin Zhijun,Hu Wenxuan,et al.Effects of deep fluid on carbonates reservoir in Tarim Basin[J].Geological review,2008,54(3):348-357.
朱东亚，金之钧，胡文瑄，等．塔里木盆地深部流体对碳酸盐岩储层影响[J].地质论评，2008，54(3)：348-357．
[15]Wan Youli,Ding Xiaoqi,Bai Xiaoliang,et al.Quartz dissolution causes and influencing factors in the Silurian marine clastic reservoir rocks in central Tarim Basin[J].Acta Sedimentologica Sinica,2014,31(3):138-147.
万友利，丁晓琪，白晓亮，等.塔中地区志留系海相碎屑岩储层石英溶蚀成因及影响因素分析[J].沉积学报，2014，32(1)：138-147.
[16]Shi Yujiang,Xiao Liang,Mao Zhiqiang,et al.An identification method for diagenetic facies with well logs and its geological significance in low-permeability sandstones:A case study on Chang 8 reservoirs in the Jiyuan region,Ordos Basin[J].Acta Petrolei Sinica,2011,32(5):820-828.
石玉江，肖亮，毛志强，等.低渗透砂岩储层成岩相测井识别方法及其地质意义——以鄂尔多斯盆地姬塬地区长8段储层为例[J].石油学报，2011，32(5)：820-828.
[17]Wang Changyong,Wang Chengyu,Liang Xiaowei,et al.Diagenetic facies of the Chang 8 oil-bearing layer of the Upper Triassic Yanchang Formation in the Jiyuan region,Ordos Basin[J].Acta Petrolei Sinica,2011,32(4):596-604.
王昌勇，王成玉，梁晓伟，等.鄂尔多斯盆地姬塬地区上三叠统延长组长8油层组成岩相[J].石油学报，2011，32(4)：596-604.
[18]Cai Yue,Li Yong,Cheng Liangbing,et al.Study of pore structure characteristics of Chang 8 low-permeability sandstone reservoirs in the Jiyuan area,Ordos Basin[J].Xinjiang Geology,2015,33(1):107-111.
蔡玥，李勇，成良丙，等.鄂尔多斯盆地姬塬地区长8低渗透砂岩储层微观孔隙结构特征研究[J].新疆石油地质，2015，33(1)：107-111.
[19]He Yanxiang,Zhang Wei,Hu Zuowei,et al.Affect of feldspar dissolution to properties of sandstone reservoir of Chang-8 oil layer in Jiyuan area,Ordos Basin[J].Natural Gas Geoscience,2010,21(3):482-488.
贺艳祥，张伟，胡作维，等.鄂尔多斯盆地姬塬地区长8油层组砂岩中长石的溶解作用对储层物性的影响[J].天然气地球科学，2010，21(3)：482-488.
[20]Liao Peng,Tang Jun,Pang Guoyin,et al.Reservoir characteristics and control factors of Chang 8₁ of Yanchang Formation of Triassic in Jiyuan region of Ordos Basin[J].Journal Mineral Petrol,2012,32(2):97-104.
廖朋，唐俊，庞国印，等.鄂尔多斯盆地姬塬地区延长组长81段储层特征及控制因素分析[J].矿物岩石，2012，32(2)：97-104.
[21]He Zixin,Fu Jinhua,Xi Shengli,et al.Geological features of reservoir formation of Sulige Gas Field[J].Acta Petrolei Sinica,2003,24(2):6-12.
何自新，付金华，席胜利，等.苏里格大气田成藏地质特征[J].石油学报，2003，24(2)：6-12.
[22]Luo Lirong,Zhang Wenzheng,Wu Kai,et al.Origin of Chang 8 oil reservoir in Jiyuan region of Ordos Basin[J].Journal of Yanan University：Natural Science Edition,2012,31(3):89-94.[JP]
罗丽荣，张文正，吴凯，等.鄂尔多斯盆地姬塬地区长8油源分析[J].延安大学学报：自然科学版，2012，31(3)：89-94.
[23]Ma Haiyong,Zhou Lifa,Zhang Xiaogang,et al.Diagenesis and favorable diagenetic facies of Chang 8 reservoir in Jiyuan area of Ordos Basin[J].Petroleum Geology & Experiment,2013,35(4):378-383.
马海勇，周立发，张小刚，等.鄂尔多斯盆地姬塬地区长8储层成岩作用与有利成岩相研究[J].石油实验地质，2013，35(4)：378-383.
[24]Wang Wenting,Zheng Rongcai,Wang Chengyu,et al.Provenance analysis of the 8^th oil-bearing member of Yanchang Formation,Upper Triassic,Jiyuan area,Ordos Basin[J].Lithologic Reservoirs,2009,21(4):41-46.
王纹婷，郑荣才，王成玉，等.鄂尔多斯盆地姬塬地区长8油层组物源分析[J].岩性油气藏，2009，21(4)：41-46.
[25]Han Yonglin,Wang Chengyu,Wang Haihong,et al.Sedimentary characteristics of shallow-water delta in Chang-8 subsection of Yanchang Formation,Jiyuan area[J].Acta Sedimentologica Sinica,2009,27(6):1057-1064.
韩永林，王成玉，王海红，等．姬塬地区长8油层组浅水三角洲沉积特征[J].沉积学报，2009，27( 6)：1057-1064．
[26]Li Yang,Zhang Wenxuan,Li Shutong,et al.Characteristics of carbonate cements and their effects on properties in Chang 8 sandstone reservoir,Ordos Basin[J].Geological Science and Technology Information,2018，37(4)：175-183.
李阳，张文选，李树同，等．鄂尔多斯盆地长8砂岩储层碳酸盐胶结物特征及其对物性的影响[J].地质科技情报，2018，37(4)：175-183．
[27]Lai Jin,Wang Guiwen,Chai Yu,et al.Mechanism analysis and quantitative assessment of pore structure for tight sandstone reservoirs:An example from Chang 8 oil layer in the Jiyuan area of Ordos Basin[J].Acta Geologica Sinica,2014,88(11):2119-2130.
赖锦，王贵文，柴毓，等.致密砂岩储层孔隙结构成因机理分析及定量评价——以鄂尔多斯盆地姬塬地区长8油层组为例[J].地质学报，2014，88(11)：2119-2130.
[28]Pittman E D,Lewan M D.Organic acids in geological processes[J].Springer-verlag,1994,39(1/2):128-129.
[29]Shi Jiannan,Zheng Rongcai,Han Yonglin,et al.Hydrocarbon accumulation mechanism of lithologic reservoir of Chang 8 member in Jiyuan area,Ordos Basin[J].Lithologic Reservoirs,2009,21(3):129-133.
史建南，郑荣才，韩永林，等.鄂尔多斯盆地姬塬地区长8油层组岩性油藏成藏机理研究[J].岩性油气藏，2009，21(3)：129-133.
[30]Manmath N P,Larry W L.A physical model of cementationand its effects on single-phase permeability[J].AAPG Bulletin,1995,79(3):431-443.
[31]Zhao Xingyuan,Luo Juncheng,Yang Fan.Application of clay mineral study results to hydrocarbon prospecting in Tarim Basin[J].Xinjiang Petroleum Geology,2005,26(5):570-576.
赵杏媛，罗俊成，杨帆.粘土矿物研究成果在塔里木盆地油气勘探中的应用[J].新疆石油地质，2005，26(5)：570-576.
[32]Zhao Xingyuan.The impact of clay minerals on oil-gas reservoir[J].Xinjiang Petroleum Geology,2009,30(4):531-536.
赵杏媛.粘土矿物与油气[J].新疆石油地质，2009，30(4)：531-536.
[33]Beard D C,Weyl P K.Influence of texture on porosity and permeability of unconsolidated sand[J].AAPG Bulletin,1973,57:349-369.
[34]Huoseknecht D W.Assessing the relative importance of compaction processes and cementation to reduction of porosity in sandstone[J].AAPG Bulletin,1987,71(71):501-510.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

[1]	彭威龙，胡国艺，刘全有，贾楠，房忱琛，龚德瑜，于聪，吕玥，王鹏威，冯子齐. 热模拟实验研究现状及值得关注的几个问题[J]. 天然气地球科学, 2018, 29(9): 1252-1263.
[2]	曾旭, 李剑, 田继先, 王波, 国建英, 沙威. 柴达木盆地腹部晚期构造带成藏模拟实验研究[J]. 天然气地球科学, 2018, 29(9): 1301-1309.
[3]	郭睿良，陈小东，马晓峰，马静，[王琪]，陈霖. 鄂尔多斯盆地陇东地区延长组长7段致密储层水平向可动流体特征及其影响因素分析[J]. 天然气地球科学, 2018, 29(5): 665-674.
[4]	翁定为，付海峰，包力庆，胥云，梁天成，张金. 水平井平面射孔实验研究[J]. 天然气地球科学, 2018, 29(4): 572-578.
[5]	段毅，吴应忠，赵阳，曹喜喜，马兰花. 草本沼泽泥炭加水热解产物烃类气体氢同位素特征[J]. 天然气地球科学, 2018, 29(3): 305-310.
[6]	张云钊，曾联波，罗群，张晨，吴浩，吕文雅，代全齐，朱德宇. 准噶尔盆地吉木萨尔凹陷芦草沟组致密储层裂缝特征和成因机制[J]. 天然气地球科学, 2018, 29(2): 211-225.
[7]	尹帅, 李爱荣, 陈梦娜, 赵金利, 丁文龙, 赵靖舟, 曹翔宇. 强变形区走滑断裂带伸展—聚敛应力效应构造解析及控气作用[J]. 天然气地球科学, 2018, 29(11): 1568-1574.
[8]	陈晓艳，田福清,邹华耀，郭柳汐,芦晓伟，殷杰，王道军. 湖相烃源岩热演化生烃研究——基于冀中坳陷烃源岩加水热模拟实验[J]. 天然气地球科学, 2018, 29(1): 103-113.
[9]	李阳，李树同，牟炜卫，闫灿灿. 鄂尔多斯盆地姬塬地区长6段致密砂岩中黏土矿物对储层物性的影响[J]. 天然气地球科学, 2017, 28(7): 1043-1053.
[10]	魏新善，陈娟萍，张道锋，闫小雄，任军锋，严婷. 鄂尔多斯盆地东部大面积致密碳酸盐岩气地质特征及成藏条件分析[J]. 天然气地球科学, 2017, 28(5): 677-686.
[11]	谢增业，李志生，国建英，张璐，董才源. 烃源岩和储层中沥青形成演化实验模拟及其意义[J]. 天然气地球科学, 2016, 27(8): 1489-1499.
[12]	吴远东，张中宁，吉利明，孙丽娜，贺聪，苏龙，夏燕青. 流体压力对半开放体系有机质模拟生烃产率和镜质体反射率的影响[J]. 天然气地球科学, 2016, 27(5): 883-891.
[13]	张明峰，熊德明，吴陈君，马万云，孙丽娜，妥进才. 准噶尔盆地东部地区侏罗系烃源岩及其低熟气形成条件[J]. 天然气地球科学, 2016, 27(2): 261-267.
[14]	陈彬滔，潘树新，方乐华，张庆石，李成刚，梁苏娟. 松辽盆地齐家—古龙凹陷青山口组泥页岩层段储层特征[J]. 天然气地球科学, 2016, 27(2): 298-308.
[15]	陶士振，李昌伟，黄纯虎，曾溅辉，张响响，杨春，高晓辉，公言杰. 煤系致密砂岩气运聚动力与二维可视化物理模拟研究——以川中地区三叠系须家河组致密砂岩气为例[J]. 天然气地球科学, 2016, 27(10): 1767-1777.