运用多种方法综合解释川东构造断陡带

Comprehensive interpretation of steep faulted zones in east Sichuan region

在川东地区二级构造单元中,无论是高陡背斜,或是低陡构造,尤其是两翼不协调(不对称)褶皱的构造类型,其陡翼轴部附近都存在一个断陡带。由于这些断陡带地质结构复杂、地震信息杂乱,较难准确解释,导致了部分油气探井的失利,制约着许多构造主体部位勘探领域的扩展;在气田开发方面,断陡带的构造细节解释不正确,偏离地下实际,造成了气藏地质模型与气藏动态特征不吻合,静态储量与动态储量误差大,直接影响了气藏开发设计方案的准确性。在卧龙河、高峰场等构造断陡带的精细解释中,运用了地质、地震、钻井、试井、气藏工程等多学科知识进行综合分析,进一步查明了断陡带特殊的内在联系,找出了断陡带构造细节变化的客观规律,初步形成了一套行之有效的解释方法。这种方法效果好、可信度高,对今后川东断陡带构造细节解释有一定的参考作用。

In the secondary rank of structural element in east Sichuan region, there exists a steep faulted zone in the vicinity of all step limp axes of both high steep anticline and low steep structure, especially for to a couple of limp is incoordination (unsymmetrical) folded structural type, which zones affect the accurate interpretation on the seismic information. For this reason, a comprehensive analysis by using multiple disciplines knowledge, including geological and seismic prospecting, drilling, well test and gas reservoir engineering, etc. was used in the interpretation of the structural detail of Wolonghe and Gaofengchang steep faulted zones. The comprehensive interpretation method has a good effect, high fiduciary level and a certain reference value for the interpretation of the structural of the steep faulted zones detail in east Sichuan.