断陷盆地中断裂作用与油气的关系

RELATIONS BETWEEN FAULTING AND PETROLEUMGAS GATHERING IN THE FAULT BASINS

断陷盆地（以黄骅坳陷为例）中广泛的断裂作用不但控制了生油凹陷的形成，而且对油气的运移和富集具有重要影响．断层的三元结构和断裂带的多元结构模型，更能合理地解释断裂作用与油气的相互关系．岩石物性参数分析表明断裂带具有双重性，即对油气的横向封堵和侧向导流．在此基础上，本文探讨了不同时代断层的断裂带对油气的封堵能力．最后通过断层剖面特征和空间配置关系的归纳研究，尝试性地对断层控制的油气藏作了形态分类．

The extensive faulting in fault basins, such as the Huanghua depression, not only controls the formation of oil-generative hollows, but also has great effecton the migration and accumulation of oil and gas.The models of the three-element fault structure and the poly-element fault zone structure may present a reasonable explanation of the relations between faulting and petroleum-gas gathering. The analysis of the petrophysical properties reveals the dual nature of fault zones, that is, the transverse sealing and the lateral fluid conduction. On this basis, the sealing capacity of the fault zones, whether growth fault or later fault, has been generally discussed, and finally, the author tentatively presents a morphological classification of oil and gas accumulation, which formed under the control of faulting' This classification is mainly based on the inductive analysis of fault profile characteristics and the relation of fault combination.The conclusion in thispaper may be significant to the.exploration and development of fault block reservoirs.