川西坳陷孝泉-新场地区须家河组二—四段构造应力场模拟及裂缝发育区带预测
|
摘要
弹 -塑性增量法应力场模拟 ,就是用若干个直线段去逼近抛物线型应力 应变曲线 ,在每个直线段中按有限元法进行弹性模拟计算。运用该方法对孝泉 -新场地区须家河组二—四段构造应力场进行了精细数值模拟。结果显示孝泉 -新场地区为一构造裂缝不发育地区 ,仅断裂带附近区域构造裂缝较发育。经地震剖面解释及构造演化分析 ,该区主要断裂带是油气运移的良好通道 ,且不存在油气的严重漏失。因此 ,断裂带附近区域是天然气勘探最有利区域 ,特别是近东西向断裂与现今主应力方向平行 ,表现为开启性 ,对天然气的导通作用更为明显。
Elastic-plastic incremental modeling of tectonic stress field is to approximate parabolic stress-strain curves with several linear portions and perform elastic modeling with finite element method in each linear portion. It is applied to perform numerical simulation of the tectonic stress field in T 3x 2-4 strata in Xiaoquan-Xinchang area.Modeling results show that structural fractures are poorly developed in this area,except in the near-fault regions where regional structural fractures are relatively well developed. Seismic section interpretation and structural evolution analysis reveal that the main fractured zones are good hydrocarbon migration pathways and no serious leakage of hydrocarbons exists.Therefore,favorable regions for gas exploration are those neighboring faults,especially the near E-W trending faults which are parallel with the current major stress and in open state can more effectively conduct gas.
Elastic-plastic incremental modeling of tectonic stress field is to approximate parabolic stress-strain curves with several linear portions and perform elastic modeling with finite element method in each linear portion. It is applied to perform numerical simulation of the tectonic stress field in T 3x 2-4 strata in Xiaoquan-Xinchang area.Modeling results show that structural fractures are poorly developed in this area,except in the near-fault regions where regional structural fractures are relatively well developed. Seismic section interpretation and structural evolution analysis reveal that the main fractured zones are good hydrocarbon migration pathways and no serious leakage of hydrocarbons exists.Therefore,favorable regions for gas exploration are those neighboring faults,especially the near E-W trending faults which are parallel with the current major stress and in open state can more effectively conduct gas.
引文
1 张金功,袁政文.泥质岩裂缝油气藏的成藏条件及资源潜力[J].石油与天然气地质,2002,23(4):336～338
2 张清.岩石力学基础[M].北京:中国铁道出版社,1986
3 万天丰.古构造应力场[M].北京:地质出版社,1988
4 赵宗举,朱琰,李大成,等.中国南方构造变形对油气藏的控制作用[J].石油与天然气地质,2002,23(1):19～25
5 刘树根,罗志立,戴苏兰,等.川西前陆盆地的“四川运动”及与油气的关系[J].石油与天然气地质,1996,17(4):276～281
6 吴志均,杨宇,刘应楷.新场气田上沙溪庙组的应力场特征[J].石油与天然气地质,2003,24(2):136～139
7 万天丰.中国东部中、新生代板内变形构造应力场及其应用[M].北京:地质出版社,1996
8 崔效峰,谢富仁.利用震源机制解对中国西南及邻区进行应力分区的初步研究[J].地震学报,1999,21(5):513～522
9 余琪祥,吴爱军,李善良,等.地应力剖面在储层开发中的应用[J].石油与天然气地质,2001,22(1):42～47
2 张清.岩石力学基础[M].北京:中国铁道出版社,1986
3 万天丰.古构造应力场[M].北京:地质出版社,1988
4 赵宗举,朱琰,李大成,等.中国南方构造变形对油气藏的控制作用[J].石油与天然气地质,2002,23(1):19～25
5 刘树根,罗志立,戴苏兰,等.川西前陆盆地的“四川运动”及与油气的关系[J].石油与天然气地质,1996,17(4):276～281
6 吴志均,杨宇,刘应楷.新场气田上沙溪庙组的应力场特征[J].石油与天然气地质,2003,24(2):136～139
7 万天丰.中国东部中、新生代板内变形构造应力场及其应用[M].北京:地质出版社,1996
8 崔效峰,谢富仁.利用震源机制解对中国西南及邻区进行应力分区的初步研究[J].地震学报,1999,21(5):513～522
9 余琪祥,吴爱军,李善良,等.地应力剖面在储层开发中的应用[J].石油与天然气地质,2001,22(1):42～47
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心