Comprehensive Research On The Rule Of Formation In Gaoqing Oilfield

Gaoqing big fault which has been regarded as a bounding fault of Dongying sag and Qingcheng uplift, is a long term inheritable active big fault of basement. It controls the formation and evolution of Qingcheng uplift and Boxing sag, and also has profound effection on hydrocarbon accumulation. In order to sum up the Gaoqing oilfield migration patterns, distribution and controlling factors of oil and gas, the main research work and fruits achieved in this paper were described as follows:(1)Studied the fault's vertical and crossrange blockage theory by seismic pumping and boiling oil and gas in the ground, and we come to the conclusion of Gaoqing big fault has obvious character of episodic transporting, it also has a character of both normal faults and torquing. The research has analysised the coossrange blockage of Gaoqing big fault, according to the litho logical ordnance in two sides of fault.(2)By analyzing the principle of the method of recovering the denudation thickness by interval transit-time and its application situation. In the process of oil-gas accumulation in Gaoqing oilfield, unconformity surface and connected sand body make an important chorus, not only fracture surface is the migration channel, but also the mudstone upon it, has plugging effect, and the sand body is the main channel for the oil-gas's lateral migration.(3)Analyzing the disposal Gaoqing oilfield hydrocarbon accumulation conditions, including oil and gas source, reservoir and cap rocks, summarizes the oil and gas migration and accumulation conditions and reservoir pattern, oil and gas distribution regularity and control factors, and pointed out the Gaoqing big fault is the main control factors of oil and gas distribution, and unconformity plays an important role, points out the large ribbons on both sides of the Gaoqing big fault has various oil and gas distribution of paleo-formation.