Effective Development Technology Study Of Lukeqin Region Heavy Oil Reservoir

LuKeQin heavy oilfield is Million tons of level heavy oil reservoirs, the oil reservoir depth2100～3600m, reservoir physical properties is poorer, porosity13%～30%, and permeability general50～700X10-3μm2, with the increase of buried depth, has the characteristics of poor west and rich east. In the middle and west of heavy oil has a high density, high viscosity, high solidifying point, high hydrocarbon content and moderate wax content of’four high and one moderete’characteristics, which is typical of the aromatic heavy oil,50degrees of viscosity of crude10200-25570mPa.s, Eastern for super heavy oil reservoir, the viscosity of crude oil is53000-72150mPa.s in50degrees. At present domestic and foreign heavy oil reservoir by means of steam injection development of the depth limit within1600m, over this depth is considered difficult for steam injection exploitation. While in Lukeqin oilfield as the reservoirs are deeply buried, it is not similar reservoir by thermal development example at home and abroad. With Lukeqin heavy oil reservoir development, needs to explore in addition to steam outside the development mode, such as improved water flooding, natural gas huff and puff, water alternate gas flooding, burning oil.This article has evaluated the middle area of the Lukeqin oilfield central comprehensive water flooding development effect and the improvement of development effect methods of layered water injection, fine with water, chemical profile control, hierarchical system development etc. have achieved good effect. The middle district of Lukeqin has14horizontal well, which initial output is1.4-2times as much as straight well and the rate of production decline and bottom rising obviously slow down compared with straight well. Chemical stimulation wins initial success, which provides a new way for the middle and high water-cut stage production. On the basis of researching the development of heavy oil reservoir at home and abroad, physical simulation experiment aimed at the enhanced oil recovery carried out and the laboratory estimated experiment launched with different temperature water flooding, under different pressure of gas and water alternate gas flooding, in different ways of chemical flooding and foam flooding. At the same time, numerical simulation research developed in the different development situations and the development of methods were compared and screened. Analysis the problem that exists in development of Lukeqin western. Through the optimization design of natural gas throughout parameter, a economic evaluation was conducted on the western area of Lukeqin oilfield and proceeded the deployment of oilfield exploitation.