万金塔构造特征及其对深层气藏的控制作用
发布时间：2018-09-06 09:49
【摘要】：万金塔地区位于德惠断陷西缘断垒带,其构造特征及变形机理与油气成藏密切相关综合区域地质、钻井及三维地震解释资料,对万金塔地区构造样式、断裂系统特征、断裂活动期次及应力场进行分析;选取贯穿研究区的两条地质剖面,利用平衡剖面技术进行复原,重塑构造演化史;基于断裂控藏作用,采用权重加权平均算法建立相应数学评价模型,提出"三参数评价法"定量评价深大断裂活动程度。研究表明:万金塔地区历经多旋回构造运动改造调整,构造叠加复杂,形成深部断陷期基底断裂及浅部反转期叠加断裂两套断裂系统。其中,沟通深部和浅部的深大断裂性质呈分段变化特点,在逆冲走滑地区断裂活动程度相对较高,控制了平面上CO_2气藏的富集,反之,在远离活动程度高的深大断裂、二期褶皱构造叠加断裂影响小、靠近沙河子组烃源岩灶的地区可能存在有机烃类气藏的富集。
[Abstract]:The Wanjinta area is located in the western margin of the Dehui fault depression. Its structural characteristics and deformation mechanism are closely related to the oil and gas reservoir formation, the comprehensive regional geology, drilling and 3D seismic interpretation data, and the structural style and fault system characteristics of the Wanjinta area. Fault activity stage and stress field are analyzed, two geological sections running through the study area are selected, and the balanced section technique is used to reconstruct the history of structural evolution. The corresponding mathematical evaluation model is established by using weighted average weight algorithm, and a "three-parameter evaluation method" is proposed to quantitatively evaluate the degree of deep and large fault activity. The study shows that the Wan-jinta area has undergone the adjustment of multi-cycle tectonic movement and complicated structural superposition, forming two sets of fault systems: the basement fault in the deep fault depression and the superimposed fault in the shallow inversion period. Among them, the characteristics of deep and large faults in the communication between deep and shallow are segmented, and the degree of fault activity is relatively high in the backwash slip area, which controls the enrichment of CO_2 gas reservoir on the plane, whereas, it is far away from the deep and large fault with high activity degree. The superimposed faults of the second stage fold structure have little influence, and the accumulation of organic hydrocarbon gas reservoirs may exist in the area near the source rocks of Shahezi formation.
【作者单位】： 中国石油化工股份有限公司东北油气分公司;甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室;
【基金】：国家自然科学基金(41502143) 中国石化科技项目(P14020)
【分类号】：P618.13
本文编号：2225967
[Abstract]:The Wanjinta area is located in the western margin of the Dehui fault depression. Its structural characteristics and deformation mechanism are closely related to the oil and gas reservoir formation, the comprehensive regional geology, drilling and 3D seismic interpretation data, and the structural style and fault system characteristics of the Wanjinta area. Fault activity stage and stress field are analyzed, two geological sections running through the study area are selected, and the balanced section technique is used to reconstruct the history of structural evolution. The corresponding mathematical evaluation model is established by using weighted average weight algorithm, and a "three-parameter evaluation method" is proposed to quantitatively evaluate the degree of deep and large fault activity. The study shows that the Wan-jinta area has undergone the adjustment of multi-cycle tectonic movement and complicated structural superposition, forming two sets of fault systems: the basement fault in the deep fault depression and the superimposed fault in the shallow inversion period. Among them, the characteristics of deep and large faults in the communication between deep and shallow are segmented, and the degree of fault activity is relatively high in the backwash slip area, which controls the enrichment of CO_2 gas reservoir on the plane, whereas, it is far away from the deep and large fault with high activity degree. The superimposed faults of the second stage fold structure have little influence, and the accumulation of organic hydrocarbon gas reservoirs may exist in the area near the source rocks of Shahezi formation.
【作者单位】： 中国石油化工股份有限公司东北油气分公司;甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室;
【基金】：国家自然科学基金(41502143) 中国石化科技项目(P14020)
【分类号】：P618.13
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