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伊通盆地属于第三系双断式断陷盆地,为郯庐断裂在中国境内的北延部分。盆地呈狭长的北东走向的条带状,自南向北发育莫里青断陷、鹿乡断陷、岔路河断陷三个次级构造单元。盆地经历了早期断陷湖盆发展阶段—稳定沉降阶段-差异沉降阶段—构造反转5个发展阶段。通过对断陷内地震资料进行全区解释,认为岔路河断陷西北缘发育以下3种构造样式:逆冲叠瓦状构造样式、走滑正花状构造样式、正断层截断构造样式。不同的构造样式控制不同的油藏分布,因此研究构造样式及其分布对于寻找油气藏的分布具有重要意义。
The Yitong Basin belongs to the Tertiary double-break faulted basin and is the northern extension of the Tan-Lu fault in China. The basin has a narrow northeast stripe, and three secondary structural units are developed from south to north such as the Muliqing Fault Depression, the Luxiang Fault Depression, and the Chaluhe Fault Depression. The basin experienced five stages of development during the early stage of faulted basin - stable settling stage - differential settling stage - tectonic inversion. Through the interpretation of the seismic data in the fault depression, it is concluded that the following three structural styles are developed in the northwestern margin of the Chaluhe fault depression: thrust-superimposed tile-like structural style, strike-slip normal flower-like structural style and normal fault truncation tectonic style. Different tectonic styles control different reservoir distributions, so studying tectonic styles and their distributions is of great significance for finding the distribution of oil and gas reservoirs.