3Dmove模拟构造裂缝预测技术在川西新场构造须二段中的应用

Application of 3Dmove fracture prediction technique in predicting in Tx_2 formation of Xinchang area

新场须家河组气藏为典型的特低孔低渗裂缝性气藏,裂缝的发育情况对气藏的勘探开发有重要作用。从新场地区构造特征及构造演化着手,利用3Dmove构造建模软件对须二段储层裂缝分布规律进行预测。研究表明:不同构造时期各层的裂缝普遍发育,Tx_2~2砂组现今时期应变量最大,裂缝主要发育在背斜的两翼。裂缝走向主要有近EW、NE和NW向3个方向,裂缝分布主要受地层形变和断裂发育的影响。

Xujiahe formation gas reservoir in Xin Chang area is a typical one with low porosity and permeability fracture. The development of fracture plays an important role in the exploration and development of gas reservoirs. Based on structural characteristics and structural evolution,3 Dmove fracture prediction technique is used to predict the distribution of reservoir fractures in Tx22 formation. It shows that the fractures of different tectonic periods are generally developed in the area. The fracture density of Tx22 sand group formation is the largest and the fractures are mainly exist in anticlinal flanks. The orientation of fractures is mainly near EW,NE and NW and their distribution is mainly affected by the deformation of the strata and faults.