Favorable block research in Lishu fault depression

摘要

With the deep development of multi fault depression in Songliao Basin in Lishu fault depression a lot of drilling cores and well logging data and seismic facies of the comprehensive study of pear of sedimentary facies and its evolution of Lishu fault depression formed at the beginning of the substrate is a group of syngenetic fault cutting, the development of small fault depression, Lishu faulted oil and gas resources are abundant and diverse, the northwest to the southeast three SW - NE trending fault zone controlled the oil and gas distribution and accumulation, and oil and gas reservoir types from the southwest depression to the northeast slope can be divided into pure gas, oil and gas zone and pure oil zone 3 is nearly NW trending distribution of oil and gas distribution. Lishu fault depression development two sets of main source rocks are Shahezi Formation and Yingcheng Formation, the type of organic matter abundance, relatively good. Oil source correlation shows that the Lishu fault depression of crude oil in addition to correspond to two kinds of different genesis of hydrocarbon source rock types of crude oil and to both mixed source and wide distribution of crude oil. The analysis of geological and geochemical indexes shows that the oil and gas migration from the deep depression to the slope along the slope and fault. The above analysis is helpful to the study of Lishu fault depression favorable areas in more detail.