赵伟波(1980-),男,河北昌黎人,博士,高级工程师,主要从事天然气勘探开发研究.E-mail:zhaowb_cq@petrochina.com.cn. |
收稿日期: 2023-06-28
修回日期: 2023-08-23
网络出版日期: 2024-01-26
Discussion on pore characteristics and forming mechanism of coal in the deep area, Ordos Basin:Case study of No.8 coal seam in Well M172 of Yulin area
Received date: 2023-06-28
Revised date: 2023-08-23
Online published: 2024-01-26
Supported by
The Forward⁃looking Basic Project of CNPC(2021DJ2303)
the Key Applied Technology Project of CNPC(2023ZZ18)
寻找深部煤层气资源分布,亟待查明深部煤储层显微组分和孔隙分布特征。以M172井8#煤为例,开展鄂尔多斯盆地榆林地区煤岩显微组分、核磁共振孔隙和电镜成像,分析了榆林地区煤岩的孔裂隙类型、孔隙连通性、孔隙度和孔径结构分布等参数,探讨了孔隙结构与显微组分、煤气孔成因机制等影响煤层储集性能的主控因素。研究结果表明:①饱和水煤样核磁弛豫时间T2 发育3个峰,峰值位于0.2 ms、8 ms和300 ms处,分别对应吸附孔、过渡孔和游离孔,并以吸附孔为主。②煤样总孔隙度、有效孔隙度都随着镜质组分的含量增加而增大;煤岩中气孔与液态烃产生有关,基质镜质体发育液态烃裂解产生的气孔群。③深层煤层存在游离气与吸附气2种赋存状态,煤层含气量更高,含气饱和度普遍超饱和,煤层气成藏主控因素更为复杂,发育断层遮挡、水动力圈闭、构造—岩性和微幅构造等多种成藏类型,成藏类型比中浅层更加丰富。通过对深部煤岩孔隙结构特征的研究与成因分析对于明确深部煤层气成藏规律具有一定地质意义。
赵伟波 , 刘洪林 , 王怀厂 , 刘德勋 , 李晓波 . 鄂尔多斯盆地深部本溪组煤孔隙特征及成因探讨——以榆林M172井8#煤为例[J]. 天然气地球科学, 2024 , 35(2) : 202 -216 . DOI: 10.11764/j.issn.1672-1926.2023.10.012
To search for the distribution of deep coalbed methane resources, it is urgent to identify the macerals and pore distribution characteristics of deep coal reservoirs. Therefore, taking the No.8 coal seam in Well M172 as an example, the paper conducted coal macerals, nuclear magnetic resonance porosity, and electron microscopy imaging in the Yulin area. The paper analyzed the parameters such as pore fracture types, pore connectivity, porosity, and pore structure distribution of coal rocks in the Yulin area, and explored the main controlling factors that affect coal seam reservoir performance, such as pore structure and macerals, as well as the mechanism of gas pore formation. The research results indicate that: (1)There are three peaks in the nuclear magnetic relaxation time T 2 of saturated water coal samples, with peaks located at 0.2 ms, 8 ms, and 300 ms, corresponding to adsorption pores, transition pores, and free pores, respectively, with adsorption pores being the main ones. (2)The total porosity and effective porosity of coal samples increase with the increase of vitrinite content; pores in coal rocks are related to the production of liquid hydrocarbons, and the matrix vitrinite develops a group of pores generated by the cracking of liquid hydrocarbons. (3)There are two types of occurrence states in deep coal seams: free gas and adsorbed gas. The coal seam has a higher gas content, and the gas saturation is generally supersaturated. The main controlling factors for coalbed methane accumulation are more complex, with multiple types of reservoir formation developed, such as fault shielding, hydrodynamic traps, structural lithology, and micro structures. The types of reservoir formation are more abundant than those in the middle and shallow layers. The study and genetic analysis of the pore structure characteristics of deep coal and rock in this article have certain geological significance for clarifying the formation laws of deep coalbed methane reservoirs.
1 |
徐凤银,王成旺,熊先钺,等.深部(层)煤层气成藏模式与关键技术对策——以鄂尔多斯盆地东缘为例[J].中国海上油气,2022,34(4):30-42,262.
XU F Y, WANG C W, XIONG X Y, et al. Deep(layer) coalbed methane reservoir forming modes and key technical counter measures:Taking the eastern margin of Ordos Basin as an example[J]. China Offshore Oil and Gas,2022,34(4):30-42,262.
|
2 |
翟成,孙勇,范宜仁,等.低场核磁共振技术在煤孔隙结构精准表征中的应用与展望[J].煤炭学报,2022,47(2):828-848.
ZHAI C, SUN Y, FAN Y R, et al. Application and prospect of low-field nuclear magnetic resonance technology in accurate characterization of coal pore structure[J].Journal of China Coal Society,2022,47(2):828-848.
|
3 |
姚艳斌,刘大锰,蔡益栋,等.基于NMR和X-CT的煤的孔裂隙精细定量表征[J].中国科学:地球科学,2010,40(11):1598-1607.
YAO Y B, LIU D M, CAI Y D, et al. Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography[J].Science China Earth Science,2010,40(11):1598-1607.
|
4 |
任会康,王安民,李昌峰,等.基于核磁共振技术的低阶煤储层孔隙特征研究[J].煤炭科学技术,2017,45(4):143-148.
REN H K, WANG A M, LI C F, et al. Study on porosity characteristics of low-rank coal reservoirs based on nuclear magnetic resonance technology[J]. Coal Science and Technology,2017,45(4):143-148.
|
5 |
谢松彬,姚艳斌,陈基瑜,等.煤储层微小孔孔隙结构的低场核磁共振研究[J].煤炭学报,2015,40(S1):170-176.
XIE S B, YAO Y B, CHEN J Y, et al. Research of micro-pore structure in coal reservoir using low-field NMR[J]. Journal of China Coal Society,2015,40(S1):170-176.
|
6 |
王传涛,党悦晨,高飞,等.低阶煤宏观煤岩组分孔隙结构特征研究[J].延安大学学报(自然科学版),2022,41(3):38-45.
WANG C T, DANG Y C, GAO F, et al. Study on macroscopic pore structure characteristics of low-rank coal[J]. Journal of Yan’an University(Natural Science Edition),2022,41(3):38-45.
|
7 |
宋慧杰.基于核磁共振实验不同变质程度煤的孔隙结构研究[J].煤,2021,30(11):88-91.
SONG H J. Study on pore structure of coal with different metamorphic degree based on nuclear magnetic resonance experiment[J]. Coal, 2021,30(11):88-91.
|
8 |
郭威,姚艳斌,刘大锰,等.基于核磁冻融技术的煤的孔隙测试研究[J].石油与天然气地质,2016,37(1):141-148.
GUO W, YAO Y B, LIU D M, et al. Research on measurement of pores in coals with NMR-C technique[J]. Oil & Gas Geology,2016,37(1):141-148.
|
9 |
刘金立,余杰,李利,等.煤储层核磁共振测量参数优化与孔隙分布精细描述[J].测井技术,2022,46(2):229-235.
LIU J L, YU J, LI L, et al. Optimization of nuclear magnetic resonance measurement parameters and accurate description of pore distribution in coalbed[J].Well Logging Technology,2022,46(2):229-235.
|
10 |
刘佳佳,胡建敏,杨明,等.不同层理高阶煤孔隙特征的核磁共振试验[J].中国安全科学学报,2021,31(9):83-89.
LIU J J,HU J M,YANG M,et al.Nuclear magnetic resonance experimental study on pore characteristics of high rank coal with different bedding[J]. China Safety Science Journal,2021,31(9):83-89.
|
11 |
刘玉龙,汤达祯,许浩,等.基于核磁共振不同煤岩类型储渗空间精细描述[J].高校地质学报,2016,22(3):543-548.
LIU Y L, TANG D Z, XU H, et al. Description of the storage-permeability under the control of macrolithotypes based on the nuclear magnetic resonance[J]. Geological Journal of China Universities,2016,22(3):543-548.
|
12 |
楚亚培,张东明,王满,等.基于核磁共振技术和压汞法的液氮冻融煤体孔隙结构损伤演化规律试验研究[J].岩石力学与工程学报,2022,41(9):1820-1831.
CHU Y P, ZHANG D M, WANG M, et al. Experiment study on influence of liquid nitrogen freeze-thaw on pore structure of coal based on nuclear magnetic resonance technology and mercury intrusion methods[J].Chinese Journal of Rock Me-chanics and Engineering,2022,41(9):1820-1831.
|
13 |
赵杰,姜亦忠,王伟男,等.用核磁共振技术确定岩石孔隙结构的实验研究[J].测井技术,2003,27(3):185-188.
ZHAO J, JIANG Y Z, WANG W N, et al. Investigation of rock pore structure using NMR technology[J]. Well Logging Technology,2003,27(3):185-188.
|
14 |
运华云,赵文杰,刘兵开,等.利用T2分布进行岩石孔隙结构研究[J].测井技术,2002,26(1):18-21,89.
YUN H Y‚ZHAO W J‚ LIU B K‚ et al. Researching rock pore structure with T2 distribution[J]. Well Logging Technology‚2002‚26(1):18-21,89.
|
15 |
王跃祥,谢冰,赖强,等.基于核磁共振测井的致密气储层孔隙结构评价与分类[J].地球物理学进展, 2023,38(2):759-767.
WANG Y X, XIE B, LAI Q, et al. Evaluation of pore structure and classification in tight gas reservoir based on NMR logging[J]. Progress in Geophysics,2023,38(2):759-767.
|
16 |
王学武,杨正明,李海波,等.核磁共振研究低渗透储层孔隙结构方法[J].西南石油大学学报(自然科学版),2010,32(2):69-72,199.
WANG X W, YANG Z M, LI H B, et al. Well logging blind deconvolution and the application in reservoir textural interface[J]. Journal of Southwest Petroleum University(Science & Technology Edition),2010,32(2):69-72,199.
|
17 |
张虔,唐海忠,牟明洋,等.基于核磁与压汞资料的储层孔隙结构特征研究[J].西南石油大学学报(自然科学版),2022,45(1):1-10.
ZHANG Q, TANG H Z, MU M Y, et al. A study on the characteristics of reservoir pore structure based on and mercury injection data[J].Journal of Southwest Petroleum University (Science & Technology Edition),2022,45(1):1-10.
|
18 |
刘标,姚素平,胡文瑄,等.核磁共振冻融法表征非常规油气储层孔隙的适用性[J].石油学报,2017,38(12):1401-1410.
LIU B, YAO S P, HU W X, et al. Application of nuclear magnetic resonance cryoporometry in unconventional reservoir rocks[J]. Acta Petrolei Sinica,2017,38(12):1401-1410.
|
19 |
杨华,刘新社,闫小雄,等.鄂尔多斯盆地神木气田的发现与天然气成藏地质特征[J].天然气工业,2015,35(6):1-13.
YANG H,LIU X S,YAN X X,et al.Discovery of Shenmu gas field and geological characteristics of natural gas accumulation in Ordos Basin[J]. Natural Gas Industry,2015,35(6):1-13.
|
20 |
杨华,刘新社.鄂尔多斯盆地古生界煤成气勘探进展[J].石油勘探与开发,2014,41(2):129-137.
YANG H, LIU X S. Progress of Paleozoic coal-derived gas exploration in Ordos Basin, West China[J]. Petroleum Exploration and Development,2014,41(2):129-137.
|
21 |
于伟,刘莉君,高博,等.基于氮气吸附-核磁共振分析的煤气化细渣孔隙结构特征[J].燃料化学学报,2022,50(8):966-973.
YU W, LIU L J, GAO B, et al. Pore structure of coal gasification fine slag based on nitrogen adsorption and nuclear magnetic resonance analysis[J].Journal of Fuel Chemistry and Te-chnology,2022,50(8):966-973.
|
22 |
杨明,柳磊,刘佳佳,等.中阶煤孔隙结构的氮吸附-压汞-核磁共振联合表征研究[J].煤炭科学技术,2021,49(5):67-74.
YANG M, LIU L, LIU J J, et al. Study on joint characterization of pore structure of middle-rank coal by nitrogen adsorption-mercury intrusion-NMR[J]. Coal Science and Technology,2021,49(5):67-74.
|
23 |
师庆民,米奕臣,王双明,等.富油煤热解流体滞留特征及其机制[J].煤炭学报,2022,47(3):1329-1337.
SHI Q M, MI Y C, WANG S M, et al. Trap characteristic and mechanism of volatiles during pyrolysis of tar-rich coal[J]. Journal of China Coal Society,2022,47(3):1329-1337.
|
24 |
闫霞,徐凤银,张雷,等.微构造对煤层气的控藏机理与控产模式[J].煤炭学报, 2022,47(2):893-905.
YAN X,XU F Y,ZHANG L,et al. Reservoir-controlling me-chanism and production-controlling patterns of microstructure to coalbed methane[J].Journal of China Coal Society,2022,47(2):893-905.
|
25 |
杨秀春,徐凤银,王虹雅,等.鄂尔多斯盆地东缘煤层气勘探开发历程与启示[J].煤田地质与勘探,2022,50(3):30-41.
YANG X C,XU F Y, WANG H Y, et al. Exploration and development process of coalbed methane in eastern margin of Ordos Basin and its enlightenment[J]. Coal Geology & Exploration,2022,50(3):30-41.
|
26 |
姚红生,陈贞龙,何希鹏,等.深部煤层气“有效支撑”理念及创新实践——以鄂尔多斯盆地延川南煤层气田为例[J].天然气工业,2022,42(6):97-106.
YAO H S, CHEN Z L, HE X P, et al. “Effective support” concept and innovative practice of deep CBM in South Yanchuan Gas Field of the Ordos Basin[J]. Natural Gas Industry,2022,42(6):97-106.
|
27 |
郭广山,柳迎红,李林涛.鄂尔多斯盆地东缘北段煤层含气量变化规律及控制因素[J].天然气地球科学,2021,32(3):416-422.
GUO G S, LIU Y H, LI L T. Study on variation law and controlling factors of coal gas content in north section of east margin of Ordos Basin[J]. Natural Gas Geoscience,2021,32(3):416-422.
|
28 |
冯树仁,张聪,张建国,等.沁水盆地南部郑庄区块高煤阶煤层气成藏模式[J].天然气地球科学, 2021,32(1):136-144.
FENG S R, ZHANG C, ZHANG J G, et al. Model of high rank coalbed methane in Zhengzhuang block in the southern Qinshui Basin, China[J]. Natural Gas Geoscience,2021,32(1):136-144.
|
29 |
申建,秦勇,傅雪海,等.深部煤层气成藏条件特殊性及其临界深度探讨[J].天然气地球科学,2014,25(9):1470-1476.
SHEN J, QIN Y, FU X H, et al. Properties of deep coalbed methane reservoir-forming conditions and critical depth discussion[J]. Natural Gas Geoscience,2014,25(9):1470-1476.
|
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