准噶尔盆地南缘异常高压泥岩段地层压力预测方法

doi:10.3969/j.issn.1006-6535.2024.05.003

特种油气藏 ›› 2024, Vol. 31 ›› Issue (5): 20-30.DOI: 10.3969/j.issn.1006-6535.2024.05.003

准噶尔盆地南缘异常高压泥岩段地层压力预测方法

田山川¹, 甘仁忠¹, 肖琳¹, 丁乙², 魏瑞华¹, 陈晓文¹, 徐永华¹, 梁利喜²

1.中国石油新疆油田分公司,新疆克拉玛依 834000;
2.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500

收稿日期:2023-12-09 修回日期:2024-06-19 出版日期:2024-10-25 发布日期:2024-12-24
通讯作者: 丁乙(1990—),男,副研究员,2013年毕业于西南石油大学石油工程专业,2020年毕业于该校油气井工程专业,获博士学位,现主要从事岩石力学与钻完井工程的基础理论与应用技术研究工作。
作者简介:田山川(1990—),男,工程师,2013年毕业于西南石油大学石油工程专业,现主要从事勘探钻井技术研究与现场管理工作。
基金资助:
中国石油-西南石油大学创新联合体科技合作项目“降低长水平段井下复杂与事故的配套技术”(2020CX040201);国家自然科学基金石化联合基金重点项目“页岩气低成本高效钻完井技术基础研究”(U1262209)

Method for Predicting Formation Pressure in Anomalously High-Pressure Mudstone Section at the Southern Margin of Junggar Basin

Tian Shanchuan¹, Gan Renzhong¹, Xiao Lin¹, Ding Yi², Wei Ruihua¹, Chen Xiaowen¹, Xu Yonghua¹, Liang Lixi²

1. PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum Uniersity Chengdu,Sichuan 610500,China

Received:2023-12-09 Revised:2024-06-19 Online:2024-10-25 Published:2024-12-24

摘要/Abstract

摘要： 准噶尔盆地南缘安集海河组泥岩层段为异常高压地层,但地层异常高压的成因机制尚不清晰。此外,该泥岩层段具有强流体敏感性,易造成测井信息产生偏差,不利于地层压力预测。为此,考虑流体作用对泥岩物性参数的影响,建立了测井物性校正方法。在此基础上,综合声速-密度曲线与综合压实曲线,揭示了泥岩地层异常高压成因机制,融合有效应力理论与多元回归分析方法,构建了泥岩段多参数地层压力预测方法。研究表明:准噶尔盆地南缘泥岩地层高压成因机制为欠压实、构造挤压以及构造压实;测井校正后,随有效应力增加,泥岩纵波时差、孔隙度、自然伽马和平均水平应力减小,密度增大;有效应力与纵波时差、密度、孔隙度呈线性关系,与自然伽马、平均水平地应力呈指数相关。以此为依据,构建了泥岩地层压力测井预测方法,验证了其适用性。研究成果有助于研究区泥岩段钻井方案设计,对准噶尔盆地南缘区域油气高效勘探开发具有重要意义。

关键词: 泥岩, 异常高压, 压力预测, 测井校正, 有效应力, 准噶尔盆地

Abstract: The mudstone section of Anjihaihe Formation in the southern margin of Junggar Basin is characterized by abnormally high pressure.The genetic mechanism of abnormal pressure is not clear.Moreover,the mudstone section exhibits strong fluid sensitivity,which can lead to deviation in well logging data and is not conducive to formation pressure prediction.To address this issue,considering the impact of fluid actions on the physical parameters of mudstone,a well logging property correction method is established.On this basis,the formation mechanism of abnormal high pressure in mudstone formation is revealed by combining sound velocity-density curve and comprehensive compaction curve.A multi-parameter formation pressure prediction method for the mudstone section has been developed,combining effective stress theory and multiple regression analysis method.The results indicates that the genetic mechanisms of high pressure in the mudstone formation at the southern margin of Junggar Basin include undercompaction,tectonic compression,and tectonic compaction.After logging correction,with the increase of effective stress,the longitudinal wave time difference,porosity,natural gamma and average horizontal stress of mudstone decrease,while the density increases.The effective stress is linearly related to the longitudinal wave time difference,density and porosity,and exponentially related to the natural gamma and average ground stress.Based on these findings,a well logging prediction method for mudstone formation pressure is constructed and its applicability has been verified.The research outcomes contribute to the design of drilling schemes in the study area and are of significant importance for the efficient exploration and development in the southern margin of Junggar Basin.

Key words: key words:mudstone, abnormally high pressure, pressure prediction, well logging correction, effective stress, Junggar Basin

中图分类号:

TE122.3

田山川, 甘仁忠, 肖琳, 丁乙, 魏瑞华, 陈晓文, 徐永华, 梁利喜. 准噶尔盆地南缘异常高压泥岩段地层压力预测方法[J]. 特种油气藏, 2024, 31(5): 20-30.

Tian Shanchuan, Gan Renzhong, Xiao Lin, Ding Yi, Wei Ruihua, Chen Xiaowen, Xu Yonghua, Liang Lixi. Method for Predicting Formation Pressure in Anomalously High-Pressure Mudstone Section at the Southern Margin of Junggar Basin[J]. Special Oil & Gas Reservoirs, 2024, 31(5): 20-30.

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准噶尔盆地南缘异常高压泥岩段地层压力预测方法

Method for Predicting Formation Pressure in Anomalously High-Pressure Mudstone Section at the Southern Margin of Junggar Basin

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