临清坳陷下第三系地震地层学研究

SEISMIC STRATIGRAPHY STUDY ON PALEOGENE SYSTEM OF THE EAST PART OF LINQING DEPRESSION

对临清坳陷东部勘探程度低的地区进行了研究，综合构造、沉积、测井等理论资料对本区的地震相、沉积相及含油气有利地带进行了分析和探讨．根据地震地层学的划分原则，确立了下第三系超层序及其间的三个层序六个亚层序，并对其特征作了一定的分析和研究。结合沉积理论，把双断式盆地的沉积背景划成了五个地区，在此基础上归纳出了数十种地震相单元。参考了古地理环境，引用了速度、岩性的解释方法研究了沉积相解释，运用测井曲线对沉积相进行了验证；用构造沉积理论分析了沙三段的成因。在此基础上确立了沙四、沙三和沙二层序的沉积相平面图。

The seismic facies,depressi on facies,oil and gas prospecting areas in the eastpart of Linqing depression were studied by means of regional seismic stratigraphic methodsintegrated with the data of structure,deposition and well loggings,A supersequence ofpaleogene system with three sequences and six hyposequence was determined according to thedividing principles of the seismic sequence. In the light of depositional theories,thedepositional setting of the fault in a basin is divided into five parts. Further,local seismicfacjes are induced many types of Seismic facies units. The depositional facies of the seismicfacies are explaincd by using paleographic environment. The source of matter and thedisection of water current and the explaination methods for vclocity and lighology arediscussed. In condideration of the depositional facies and lighologic facies for single well,loggings were used to test the depositional facies; The segmnent planimentric maps of the depositional faciets in Es4, Es3 and Es2 were drawn. Depending on the plane array of thedepositional facies, six types of main depositlonal systems in this area were confirmed. Thegeneration mechanism was studied.