APPLICATION OF GEOSTRESS PROFILE IN RESERVOIR EXPLOITATION: TAKE RESERVOIRS OF SHAXIMIAO FORMATION OF XL GASFIELD IN WEST SICHUAN FOR EXAMPLE

Yu Qixiang; Wu Aijun; Li Shanliang; Bi Lanying

doi:10.11743/ogg20010110

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APPLICATION OF GEOSTRESS PROFILE IN RESERVOIR EXPLOITATION: TAKE RESERVOIRS OF SHAXIMIAO FORMATION OF XL GASFIELD IN WEST SICHUAN FOR EXAMPLE
Vol. 22, Issue 1, Pages: 42-47(2001)
Online First：25 March 2001，

Published：2001
DOI： 10.11743/ogg20010110
稿件说明：

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DOI：

Yu Qixiang, Wu Aijun, Li Shanliang, et al. APPLICATION OF GEOSTRESS PROFILE IN RESERVOIR EXPLOITATION: TAKE RESERVOIRS OF SHAXIMIAO FORMATION OF XL GASFIELD IN WEST SICHUAN FOR EXAMPLE[J]. 2001, 22(1): 42-47. DOI： 10.11743/ogg20010110.

摘要

地应力剖面的研制为测井资料开辟了新的应用领域.通过对川西XL气田4口井的地应力剖面分析

川西XL气田沙溪庙组储层岩石力学参数、三向主应力、水平应力场方向、工程常用压力及出砂指数有如下特征:孔隙、裂缝的发育程度能够对储层的力学性质产生影响;三向主应力一般满足关系式:σ

裂隙发育的层位水平主应力、破裂压力较围岩低

坍塌压力较围岩高;水平主应力方向与川西区域构造水平主应力方向基本一致

但个别层位主应力方向发生了较大变化;出砂指数值较高

基本不存在出砂现象.

Abstract

The development of geostress profile has opened a new field for log data application.According to the analysis of the geostress field of 4 wells in XL Gasfield in West Sichuan

the rock dynamic parameters

the 3-D principal stress

the direction of horizontal stress field

the common engineering pressure and sand producing index of the reservoir in Shaximaio Formation of XL Gasfield in West Sichuan have following characters:1.the development degree of porosity and fractures can effect reservoir dynamic property;2.3-D principal stress could usually satisfy the following relational expression:σ

the horizontal stress and breakdown pressure of fracture developed horizon are usually lower than that of country rock

but the slump pressure is higher than that of the country rock;3.horizontal principal stress basically coincides with horizontal principal stress of regional tectonics in West Sichuan excepting particular horizons;4.sand producing index is high and there is no sand produced.