四川盆地涪陵地区页岩储层压力预测及高压形成机制分析

陈亚琳; 郁飞; 罗兵; 邹贤军

doi:10.11781/sysydz201801110

四川盆地涪陵地区页岩储层压力预测及高压形成机制分析

doi: 10.11781/sysydz201801110

中国石化江汉油田分公司勘探开发研究院, 武汉 430223

基金项目: 国家科技重大专项（2016ZX05060）和中国石化科技项目（P17014-2）资助。

详细信息

作者简介:
陈亚琳(1985-),女,工程师,主要从事地震储层预测研究。E-mail:chenyalin111@126.com。

中图分类号: TE122.2
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出版历程
- 收稿日期: 2017-10-13
- 修回日期: 2017-12-04
- 刊出日期: 2018-01-28

Formation pressure prediction and high pressure formation mechanisms of shale reservoirs in Fuling area, Sichuan Basin

Research Institute of Petroleum Exploration and Development, SINOPEC Jianghan Oilfield Company, Wuhan, Hubei 430223, China

摘要

摘要: 地层压力是反映页岩气保存条件的重要指标之一，是影响页岩气产能的重要因素。涪陵页岩气田构造特征复杂，地层压力变化大，如何准确预测地层压力对页岩气勘探开发尤为重要。在对现有地层压力预测方法系统分析的基础上，将Eaton法作为涪陵页岩气田地层压力预测的首选方法，并结合涪陵地区地质特征，通过"纵向分段、平面分区、多井联合"的方式对正常压实趋势线的建立过程进行质控，以提高单井孔隙压力预测的精度，通过广义线性反演为核心的高精度地震层速度处理技术提高三维孔隙压力预测精度。此外，基于声波速度-密度交会图以及有机质演化特征、构造地质特征，对涪陵地区页岩层段的高压成因机制进行探索性研究，认为涪陵地区志留系页岩层段的压力异常是由欠压实、生烃作用和构造挤压3种机制共同作用的结果。
- 页岩气 /
- 地层压力 /
- 正常压实趋势线 /
- 广义线性速度反演 /
- 异常高压 /
- 涪陵地区 /
- 四川盆地
Abstract: Formation pressure is one of the important indicators to reflect shale gas preservation conditions, and is also an important factor affecting shale gas production. In the Fuling shale gas field, which has complex structure characteristics and variable formation pressure distribution, it is particularly important to accurately predict the formation pressure in shale gas exploration and development. The Eaton method was a preferred method for the prediction of formation pressure in the Fuling shale gas field based on the systematic analysis of the existing prediction methods. Combined with the geologic characteristics of Fuling area, the established method for normal compaction trend (NCT) lines was improved through vertical segmentation, plane partitioning and multi-well combination. It improved the accuracy of single well pressure prediction. The accuracy of 3D formation pressure prediction was improved by high-precision seismic layer velocity processing with generalized linear inversion. Based on the acoustic velocity-density intersection diagram and organic matter evolution characteristics and structural features, the paper explored the high pressure formation mechanisms of shale intervals in the Fuling area. It was concluded that the abnormal pressure in the Silurian shale formations in the Fuling area was the result of the combined effect of three mechanisms:undercompaction, hydrocarbon generation and tectonic compression.
- shale gas /
- formation pressure /
- normal compaction trend line /
- generalized linear velocity inversion /
- abnormal high pressure /
- Fuling area /
- Sichuan Basin

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参考文献(23)

[1]	王玉柱,孟召平,郭锐,等.华南古生界页岩储层压力预测方法及其应用研究[J].煤炭学报,2016,41(10):2631-2637. WANG Yuzhu,MENG Zhaoping,GUO Rui,et al.Study on pore pressure prediction of Paleozoic shale reservoir in Southern China and its application[J].Journal of China Coal Society,2016,41(10):2631-2637.
[2]	魏祥峰,李宇平,魏志红,等.保存条件对四川盆地及周缘海相页岩气富集高产的影响机制[J].石油实验地质,2017,39(2):147-153. WEI Xiangfeng,LI Yuping,WEI Zhihong,et al.Effects of pre-servation conditions on enrichment and high yield of shale gas in Sichuan Basin and its periphery[J].Petroleum Geology & Experiment,2017,39(2):147-153.
[3]	燕继红,李启桂,朱祥.四川盆地及周缘下寒武统页岩气成藏主控因素与勘探方向[J].石油实验地质,2016,38(4):445-452. YAN Jihong,LI Qigui,ZHU Xiang.Main factors controlling shale gas accumulation and exploration targets in the Lower Cambrian,Sichuan Basin and its periphery[J].Petroleum Geology & Experiment,2016,38(4):445-452.
[4]	TERZAGHI K.Theoretical soil mechanics[M].New York:John Wiley & Sons,Inc,1943.
[5]	刘震,张万选,张厚福,等.辽西凹陷北洼下第三系异常地层压力分析[J].石油学报,1993,14(1):14-24. LIU Zhen,ZHANG Wanxuan,ZHANG Houfu,et al.An analysis of abnormal formation pressures of Paleogene in the north sag of Liaoxi depression[J].Acta Petrolei Sinica,1993,14(1):14-24.
[6]	云美厚.地震地层压力预测[J].石油地球物理勘探,1996,31(4):575-586. YUN Meihou.Formation pressure prediction using seismic data[J].Oil Geophysical Prospecting,1996,31(4):575-586.
[7]	PENNEBAKER E S.Seismic data indicate depth,magnitude of abnormal pressures[J].World Oil,1968:166.
[8]	SAYERS C M,JOHNSON G M,DENYER G.Predrill pore-pressure prediction using seismic data[J].Geophysics,2002,67(4):1286-1292.
[9]	BULAND A,KOLBJØNSEN O,CARTER A J.Bayesian dix inversion[J].Geophysics,2011,76(2):R15-R22.
[10]	FILLIPPONE W R.On the prediction of abnormally pressured sedimentary rocks from seismic data[C]//Offshore Technology Conference.Houston,Texas:Offshore Technology Conference,1979:2667-2669.
[11]	BOWERS G L.Pore pressure estimation from velocity data:accoun-ting for overpressure mechanisms besides undercompaction[J].SPE Drilling & Completion,1995,1(2):89-95.
[12]	FILLIPPONE W R.Estimation of formation parameters and the prediction of overpressures from seismic data[C]//1982 SEG Annual Meeting.Dallas,Texas:Society of Exploration Geophysicists,1982:17-21.
[13]	EATON B A.Graphical method predicts geopressures worldwide[J].World Oil,1976,183:100-104.
[14]	孙健,罗兵.四川盆地涪陵页岩气田构造变形特征及对含气性的影响[J].石油与天然气地质,2016,37(6):809-818. SUN Jian,LUO Bing.Structural deformation and its influences on gas storage in Fuling shale gas play,the Sichuan Basin[J].Oil & Gas Geology,2016,37(6):809-818.
[15]	蒋凤仙.用地震层速度预测地层压力的方法特点及精度[J].江汉石油学院学报,1988,10(1):50-56. JIANG Fengxian.Some methods for predicting the layer's pressure using seismic interval velocity and the prediction precision[J].Journal of Jianghan Petroleum Institute,1988,10(1):50-56.
[16]	屈大鹏,陈超,王明飞,等.川东南地区基于海相泥页岩地层的压力系数预测:以丁山区块为例[J].物探与化探,2016,40(2):349-352. QU Dapeng,CHEN Chao,WANG Mingfei,et al.Researches based on the prediction methods of marine-shale pressure coefficients in southeastern Sichuan Basin:A case study of DS area[J].Geophysical and Geochemical Exploration,2016,40(2):349-352.
[17]	叶志,樊洪海,蔡军,等.一种异常高压形成机制判别方法与应用[J].中国石油大学学报(自然科学版),2012,36(3):102-107. YE Zhi,FAN Honghai,CAI Jun,et al.Investigation and application of a discrimination method for abnormal high formation pressure forming mechanism[J].Journal of China University of Petroleum,2012,36(3):102-107.
[18]	SWARBRICK R E,OSBORNE M J.Mechanisms that generate abnormal pressures:An overvie[R].Tulsa,OK:AAPG,1998:13-34.
[19]	BOWERS G L.Detecting high overpressure[J].The Leading Edge,2002,21(2):174-177.
[20]	李兰斌,孙家振,陈文礼,等.舞阳盐湖盆地地层压力特征与成因机理探讨[J].石油实验地质,2000,22(3):265-269. LI Lanbin,SUN Jiazhen,CHEN Wenli,et al.Characteristics and genetic mechanism of formation pressure in the Wuyang salt-lake Basin[J].Experimental Petroleum Geology,2000,22(3):265-269.
[21]	刘洪林,王红岩,方朝合,等.中国南方海相页岩气超压机制及选区指标研究[J].地学前缘,2016,23(2):48-54. LIU Honglin,WANG Hongyan,FANG Chaohe,et al.The formation mechanism of over-pressure reservoir and target screening index of the marine shale in the South China[J].Earth Science Frontiers,2016,23(2):48-54.
[22]	郑民,李建忠,吴晓智,等.海相页岩烃源岩系中有机质的高温裂解生气潜力[J].中国石油勘探,2014,19(3):1-11. ZHENG Min,LI Jianzhong,WU Xiaozhi,et al.High-temperature pyrolysis gas-sourcing potential of organic matter in marine shale source rock system[J].China Petroleum Exploration,2014,19(3):1-11.
[23]	高岗,黄志龙,王兆峰,等.地层异常高压形成机理的研究[J].西安石油大学学报(自然科学版),2005,20(1):1-7. GAO Gang,HUANG Zhilong,WANG Zhaofeng,et al.Study on the mechanisms of the formation of formation abnormal high-pressure[J].Journal of Xi'an Shiyou University (Natural Science Edition),2005,20(1):1-7.