非常规储层异常压力测井预测方法及应用  

Method and application of abnormal pressure logging prediction for unconventional reservoir

作　　者：马骄 斯尚华 刘超[1,2] 何俊昊 杨哲恒[1,2] 黄智涵 MA Jiao;SI ShangHua;LIU Chao;HE JunHao;YANG ZheHeng;HUANG ZhiHan(School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,西安710065

出　　处：《地球物理学进展》2023年第2期700-708,共9页Progress in Geophysics

基　　金：国家自然科学基金青年项目“岩浆侵入热接触围岩储层中自生热液碳酸盐矿物的形成/溶蚀机制”(42002159)资助。

摘　　要：超压在含油气盆地中普遍存在,异常压力的预测是油气探勘开发中的重要研究内容.本文基于测井预测异常压力的方法,对准噶尔盆地致密油、松辽盆地致密气、川南五峰—龙马溪组页岩气的超压特征进行了研究,探讨了该方法在非常规油气勘探中的运用.研究表明,莫索湾地区三工河组致密储层平均压力为47.52 MPa,压力系数平均为1.3,八道湾组平均压力为62.5 MPa,压力系数平均为1.4.德惠断陷从营城组顶部,地层表现出超压的特征,压力系数从1.32~1.7,具有明显的高压-超高压特征,且随着深度的增加,地层压力与静水压力的差值越大.川南五峰—龙马溪组页岩压力系数1.22~1.61,平均值为1.44,具有超压的特征.超压为致密储层保留了大量原生孔隙,压力系数可以作为非常规油气有利区预测、储层评价的标准.Overpressure is common in petroliferous basins, and the prediction of abnormal pressure is an important research content in oil and gas exploration and development. Based on the method of predicting abnormal pressure by well logging, this paper studies the overpressure characteristics of Junggar basin tight oil, tight gas in Songliao Basin and shale gas in Wufeng-longmaxi formation in south Sichuan, the application of this method in unconventional oil and gas exploration is discussed. The study shows that the average pressure of Sangonghe formation is 47.52 MPa, the average pressure coefficient is 1.3, the average pressure of Badaowan formation is 62.5 MPa, and the average pressure coefficient is 1.4. From the top of Yingcheng formation in Dehui fault depression, the strata show the characteristics of overpressure, and the pressure Coefficient is from 1.32 to 1.7, which shows obvious characteristics of high-ultra-high pressure. The pressure Coefficient of Wufeng—longmaxi formation in southern Sichuan is 1.22~1.61, with an average value of 1.44, which is characterized by overpressure. Overpressure reserves a lot of primary pores for tight reservoirs, and pressure coefficient can be used as a criterion for prediction and reservoir evaluation of unconventional favorable oil and gas zones.

关 键 词：超压带 压力系数 异常压力预测 非常规储层 

分 类 号：P631[天文地球—地质矿产勘探]