Oil Source Faults Transporting Capacity And Its Reservoir Control Effects

Oil source fault is the main channel of reservoir formation by migration of oil and gas generated from lower source rock to overlying reservoir,which is the research goal of this paper.However,there is still a lack of quantitative evaluation on the accumulation and enrichment of oil and gas near the oil source fault.Therefore,this paper studies the oil and gas transportation ability and reservoir control of oil-source fault,and the research results are beneficial to the discovery of exploration targets and the determination of the oil rich degree of target blocks,which will certainly promote the exploration process of oil and gas fields.Firstly,the oil source faults are determined by synthetically analyzing the key period of oil and gas accumulation and the development of source reservoir and caprock.On the basis of this,the ridge of the convex face is identified by the contour method of the section buried depth and the three-position geological modeling,and the transition zone is identified by the method of the break-distance curve and the method of the contour line of the cross-section.The strong active zone of the fault is determined by the diagram of the relation between the activity rate of the fault and the oil-bearing property of the nearby strata,and the favorable position of oil and gas transportation from the oil-source fault is determined.Finally,the quantitative evaluation formula is established through the comprehensive analysis of the factors affecting the oil and gas transport capacity of oil source faults,and it is applied to the actual exploration.Taking the Wuerxun area of Haita Basin,the NP4-10 fault of Nanbao No.2 structure and the Liuchu area as examples,it is concluded that the oil source faults in the Wuerxun area of the Heita Basin can be divided into the following four types: oil source fault.Type ? oil source fault,type ? secondary oil source fault and type ? secondary oil source fault from the uplift ridge of type ? oil source fault.This paper studies the favorable position of oil-source fault transporting oil and gas from three aspects,such as fault transition zone and fault activity intensity.3 the factors influencing oil and gas transportation ability of oil-source fault are: source rock quality,uplift ridge parameter,fault mud content,etc.Study on the formation overpressure and the Establishment of Oil Source The quantitative evaluation formula of oil and gas transport ability of fault shows that the coefficient of transportation ability and the degree of accumulation of oil and gas are consistent with the control effect of oil source fault on oil and gas accumulation in the following aspects: oil source fault controls oil and gas accumulation area;The distribution of oil and gas is controlled by the favorable position of oil and gas transportation by oil source fault;the degree of oil and gas enrichmentis controlled by the ability of oil source fault to carry oil and gas.