地应力剖面在储层开发中的应用——以川西XL气田沙溪庙组储层为例

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

余琪祥 吴爱军 李善良 毕兰英

Yu Qixiang Wu Aijun Li Shanliang Bi Lanying

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>σ>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.

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>σ>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.

10.11743/ogg20010110