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近日,辽河超稠油区块杜229块蒸汽驱先导试验区日产油220 t,采油速度3.5%,累计增油23.3万t,阶段采出程度60%,油汽、采注比、阶段采出程度等核心指标均超过国外同类试验性油田。辽河超稠油黏度可达5万~30万m Pa·s,远高于蒸汽驱开发要求的1万m Pa·s,是蒸汽驱开发的“禁区”。而杜229块为薄互层状油层,单层厚度小,不适合采用SAGD(蒸汽辅助重力泄油)技术。此类油藏吞吐后期提高采收率技术,成为亟待科研人员攻关的课题。
Recently, the Lvhe super heavy oil block Du 229 steam drive pilot test zone daily output of 220 t, oil production rate of 3.5%, total oil 233,000 t, the stage of the degree of recovery of 60%, oil and gas, mining ratio, the stage of mining Degree and other core indicators are more than similar foreign experimental oil field. The viscosity of Liaohe super heavy oil can reach 50000 ~ 300000 mPa · s, which is much higher than 10,000 mPa · s required by the development of steam flooding and is the “restricted area” developed by steam flooding. Du 229 block is a thin interbedded reservoir with a small single layer thickness that is not suitable for SAGD (steam assisted gravity drainage) technology. These reservoirs increase throughput late post-harvest technology, researchers have urgent research topics.