The Eastern Sag Of Liaohe Depression Ma19 Block Of Dongying Group Of The Study Of Residual Oil Distribution And Potential Tapping Measures

Residual oil means that after a period of time or after a certain amount of mining, stay in the reservoir of oil and gas reservoir. Remaining oil reserves to increase recoverable reserves and improve oil recovery is a huge potential. Residual oil prediction is one of the most the focus of attention of petroleum exploration and development, is one of the three core technologies of oilfield development. Horse 19 block of dongying group in majuanzi oil reservoir after more than 40 years of development, now has entered high water cut stage, water cut has been as high as 95%, 87.23% of the Wells because of casing deformation, sets of bad, sand wax shut-in. The core content of high water cut stage oilfield development and adjustment is " to know the remaining oil, the exploitation of remaining oil. Not only to the remaining oil distribution in the study of residual oil distribution, also want to point out that the object of tapping the remaining oil and technology.In this paper, from the perspective of development geology, technology and methods using fine reservoir description, fine description of micro structure, sedimentary microfacies, reservoir fine interpretation of low resistivity oil gas water identification, a detailed analysis of the reasons for the formation of the remaining oil research area, controlling factors, distribution characteristics and the accumulation area, find out the remaining oil tapping projects.Study on that horse 19 block residual oil type has two kinds, one kind is controlled by tectonic action and deposition of reservoir remaining oil caused by heterogeneity, another type of remaining oil is not included in the development plan. By two main tectonics and sedimentation control. The distributary channel sand body side edge, interchannel thin sand, frontal thin sand, the upper part of the positive rhythm reservoir, fault edge near the highs, micro, micro faulted convex structure, fault angle near parallel faults, intermittent block position, is a rich area of remaining oil.In the target area, development of residual oil by sidetracked hole combined with adjustment wells methods,improve the well pattern, reservoir effectively, enhanced oil recovery; For low resistivity reservoir at the same time led to the development plan in the remaining oil, by the method of logging secondary interpretation to establishing standards for oil and gas layer, in the original "dry layer", "water" and "not explain layer" in looking for reservoir, potentialities and remaining oil to new ideas.