Source rocks and tight conglomerate gas resource potential evaluation in Shahezi Formation of Xujiaweizi Depression, Songliao Basin
Received date: 2016-01-18
Revised date: 2016-12-12
Online published: 2017-03-10
Taking the source rocks in Shahezi Formation of Xujiawezi Depression as an object for study, source rocks' distribution, organic heterogeneity, burial history, thermal history and hydrocarbon generation history were analyzed.Gas generation amount was calculated using chemical kinetics theory and Monte Carlo technology.Resource potential of tight conglomerate gas was predicted using analogism and genetic methods.Source rocks' distributions were determined by seismic-logging-sedimentary comprehensive study.It indicated that dark mudstone widely developed in the basin.The general thickness is 200-800m, and the maximum thickness is over 1 200m in the central depression.Coal mostly developed in the northern part of the depression, with a maximum thickness over 120m.Total organic carbon (TOC) was evaluated by core testing and logging curves.TOC value ranged from 0.26% to 9.86%, with an average value of 2.21%.Kerogen type is mainly Ⅲ, and the thermal maturity was high to over mature.Shahezi Formation has experienced four times of deposition and a significant uplift, buried depth kept steady since 65Ma ago.Terrestrial heat flow was high in ancient time but low today, the average geothermal gradient for rift period and depression period was 5.2℃/100m and 4.5℃/100m respectively.Natural gas of dark mudstone and coal was quickly generated from 105Ma and 90Ma respectively.Total gas generating intensity was generally greater than 50×108m3, and expected value of gas generating amount was 36.3×1012m3.Resource potential of tight conglomerate gas predicted by analogism method was 0.21×1012m3, and the value was 0.15×1012m3 by genetic method (migration and accumulation coefficient is 0.4%, gas generation amount taking expected value).
Liu Chao . Source rocks and tight conglomerate gas resource potential evaluation in Shahezi Formation of Xujiaweizi Depression, Songliao Basin[J]. Natural Gas Geoscience, 2017 , 28(3) : 429 -438 . DOI: 10.11764/j.issn.1672-1926.2017.01.016
[1]Feng Zihui,Yin Changhai,Liu Jiajun,et al.Ormation mechanism of in-situ volcanic reservoirs in eastern China:A case study from Xushen Gasfield in Songliao Basin[J].Science China:Earth Sciences,2014,44(10):2221-2237.[冯子辉,印长海,刘家军,等.中国东部原位火山岩油气藏的形成机制——以松辽盆地徐深气田为例[J].中国科学:地球科学,2014,44(10):2221-2237.
[2]Xiao Lihua,Zhang Lei,Tian Weizhi,et al.High-quality reservoir prediction of deep tight glutenites in Xujiaweizi Fault Depression[J].Journal of Central South University:Science and Technology,2014,45(4):1174-1182.[肖丽华,张磊,田伟志,等.徐家围子断陷深层致密砂砾岩优质储层预测[J].中南大学学报:自然科学版,2014,45(4):1174-1182.
[3]Wang Shuxue,Zhou Qinghua,Zhou Qingqiang,et al.Gas-bearing system and accumulation mechanism of deep layer in Xujiaweizi fault depression[J].Natural Gas Geoscience,2007,18(3):394-398.[王树学,周庆华,周庆强,等.松辽盆地徐家围子断陷深层天然气含气系统与成藏机制[J].天然气地球科学,2007,18(3):394-398.]
[4]Fu Guang,Sun Jianjun,Xu Shuyan.Forecasting of gas prospecting in Xujiaweizi region from the match function between the source rock and caprocks[J].Natural Gas Geoscience,2004,15(6):580-583.[付广,孙建军,徐淑艳.从源盖时空匹配关系预测徐家围子断陷的天然气远景[J].天然气地球科学,2004,15(6):580-583.
[5]Zhu Yingkang.Formation mechanism of volcanic gas reservoir and favorable areas predication in Xujiaweizi Fault Depression[J].Journal of Jilin University:Earth Science Edition,2011,41(1):69-77.[朱映康.徐家围子断陷火山岩气藏成藏机制及有利区预测[J].吉林大学学报:地球科学版,2011,41(1):69-77.]
[6]Fu Guang,Wu Wei,Li Na.Control effect of three large faults on the gas pools in the Xujiaweizi Faulted Depression,Songliao Basin[J].Natural Gas Industry,2014,34(7):7-12.[付广,吴薇,历娜.松辽盆地徐家围子断陷大型断裂带对天然气成藏的控制作用[J].天然气工业,2014,34(7):7-12.]
[7]Li Jingkun,Liu Wei,Song Lanbin.A study of hydrocarbon generation conditions of deep source rocks in Xujiaweizi Fault Depression of the Songliao Basin[J].Natural Gas Industry,2006,26(6):21-24.[李景坤,刘伟,宋兰斌.徐家围子断陷深层烃源岩生烃条件[J].天然气工业,2006,26(6):21-24.]
[8]Law B E,Curtis J B.Introduction to unconventional petroleum systems[J] AAPG Bulletin,2002,86(11):1851-1852.
[9]Li Jianzhong,Guo Bincheng,Zheng Min,et al.Main types,geological features and resource potential of tight sandstone gastrin in China[J].Natural Gas Geoscience,2012,23(4):607-615.[李建忠,郭彬程,郑民,等.中国致密砂岩气主要类型、地质特征与资源潜力[J].天然气地球科学,2012,23(4)607-615.
[10]Zhang Yina,Zhang Gongcheng,He Yuping,et al.Sedimentation and source rock characteristics of Yacheng Formation in Beijiao Sag of Qiongdongnan Basin[J].Natural Gas Geoscience,2013,24(4):725-732.[张义娜,张功成,何玉平,等.琼东南盆地北礁凹陷崖城组沉积与烃源岩发育特征[J].天然气地球科学,2013,24(4):725-732.
[11]Gu Lijing,Xu Shouyu,Su Jin,et al.Muddy hydrocarbon source rock prediction and evaluation with seismic data[J].Natural Gas Geoscience,2011,22(3):554-560.[顾礼敬,徐守余,苏劲,等.利用地震资料预测和评价烃源岩[J].天然气地球科学,2011,22(3):554-560.]
[12]Liu Chao,Lu Shuangfang,Xue Haitao.Variable-coefficient ΔlogR model and its application in shale organic evaluation[J].Progress in Geophysics,2014,29(1):312-317.[刘超,卢双舫,薛海涛.变系数ΔlogR方法及其在泥页岩有机质评价中的应用[J].地球物理学进展,2014,29(1):312-317.]
[13]Luo Jinglan,Shao Hongmei,Yang Yanfang,et al.Temporal and spatial evolution of burialhy-drocarbon process of deep volcanic reservoir in Songliao Basin[J].Earth Science Frontiers,2013,20(5):175-187.[罗静兰,邵红梅,杨艳芳,等.松辽盆地深层火山岩储层的埋藏_烃类充注_成岩时空演化过程[J].地学前缘,2013,20(5):175-187.]
[14]Zhou Qinghua,Feng Zihui,Men Guangtian.Songliao Basin Xujiaweizi,faulted the present geothemal characterisyics and its relationship with the natural gas to generate research[J].Science in China:Series D,2007,37(supplementⅡ):177-188.[周庆华,冯子辉,门广田.松辽盆地北部徐家围子断陷现今地温特征及其与天然气生成关系研究[J].中国科学:D辑,2007,37(增刊Ⅱ):177-188.]
[15]Wang Min,Sun Yefeng,Wang Wenguang,et al.Gas generation characteristics and resource potential of the deep source rock in Xujiaweizi Fault Depression,northern Songliao Basin[J].Natural Gas Geoscience,2014,25(7):1011-1018.[王民,孙业峰,王文广,等.盖松辽盆地北部徐家围子断陷深层烃源岩生气特征及天然气资源潜力[J].天然气地球科学,2014,25(7):1011-1018.]
[16]Li Wei,Lu Xuesong,Liu Shaobo,et al.Application of stochastic etsimulation in petroleum resources assessment[J].Fault Block Oil and Gasfield,2013,20(4):443-446.[李伟,鲁雪松,柳少波,等.随机模拟在油气资源评价中的应用[J].断块油气田,2013,20(4):443-446.]
[17]Olea R A,Cook T A,Coleman J L.A methodology for the assessment of unconventional(continuous)resources with an application to the greater natural buttes gasfield,Utah[J].Natural Resources Research,2010,19(4):237-251.
[18]Chen Z,Osadetz,K G.Undiscovered petroleum asscumulation mapping using model based stochastic simulation[J].Methematical Geology,2006,38(1):1-16.
[19]Wang Weiming,Lu Shuangfang,Chen Xuan,et al.A new method for grading and ssessing the potential of tight sand gas resources:A case study of the Lower Jurassic Shuixigou Group in the Turpan-Hami Basin[J].Petroleum Exploration and Development,2015,42(1):60-67.[王伟明,卢双舫,陈旋,等.致密砂岩气资源分级评价新方法——以吐哈盆地下侏罗统水西沟群为例[J].石油勘探与开发,2015,42(1):60-67.]
[20][KG*6/7]Pu Yong.Prediction about the abundant belts of tight sandstone gas reservoirs through gradual penetration[J].Journal of Southwest Petroleum Unversity:Science & Technology Edition,2006,38(2):59-67.[蒲勇.致密砂岩气藏高产富集带逐级深入的预测方法[J].西南石油大学学报:自然科学版,2016,38(2):59-67.]
[21]Li Jian,Wei Guoqi,Xie Zengye,et al.Mechanism and main controlling factors of large tight sandstone gasfields in China:Cases study on Ordos Basin and Sichuan Basin accumulation[J].Acta Petrolei Sicina,2013,34(supplement1):14-28.[李剑,魏国齐,谢增业,等.中国致密砂岩大气田成藏机理与主控因素—以鄂尔多斯盆地和四川盆地为例[J].石油学报,2013,34(增刊1):14-28.]
[22]Lu Xuesong,Liu Shaobo,Li Wei,et al.Geological and resource evaluation in tight sandstone gas plays of low exploration degree:A case of Jurassic tight sandstone gas in east Kuqa Basin[J].Natural Gas Geoscience,2014,25(2):178-184.[鲁雪松,柳少波,李伟,等.低勘探程度致密砂岩气区地质和资源潜力评价——以库车东部侏罗系致密砂岩气为例[J].天然气地球科学,2014,25(2):178-184.]
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