Tectonic And Sedimentary Features Of Lower Cretaceous In South Huabei Basin Tanzhuang Sag

The article based on the materials of geology, seismic, drilling and logging well,analysis and chemical test, and so on, in South-Northern basin. Systematically classified and compared strata of Lower Crataceous in Tan zhuang sag, confirmed the four cases strata top down, which are the Ba cun, lower-upper segment of Yong feng, and Shang shui formation.The Northern ramp region, Southern broken module region and Western broken nose structural rgion of Shuang lou tian of Lower Crataceous in Tan zhuang seg are classified through systematically studied the strata structural feature. The NEE and NW-NWW form the fault system, which distributed reasonably in plane, the fault extensional in early and later phase, compressived in middle period, the fault of Shang shui in North and Ye lu in South which control the deposition and conservation in Lower Crataceous and Cenozoic by different activity styles. According to the regional tectonics background and stress action, structure type in the study area can be divided thrust-overriding structural, elongation, strike-slip and inversion invert.By the means of analyzing the different formations deposition in Lower Crataceous, which confirms it mainly consists of shallow water delta and lake deposition, it constitute two heavy sedimentary sequence vertically. Normality delta, braided channel delta and lake (brink meare) can be identified. At the same time, it can be confirmed two big provenances come from North and South.Following the preceding study, not only optimized and evaluated traps in the advantageous deposition phase belt, pointed out delta front region in North, slump hackberry facies in the middle part and fan delta in South nearby the lake zone, which are the favorable exploring zones in the next step, but also pointed out the favorable exploring targets, which are the breaking nose structure in the North of Zhou can 12 well and the breaking nose structure in the North of Zhou 18 well. At the same time, proposed deploying 3D seismic 100Km~2 in the Shuang lou tian regionand prospecting well in the North of Zhou can 12 well.