文东深层低渗透多油层砂岩油田细分层系开发

The subdivision of series of strata development of deep Wendong oil field with low permeability and multiple layers

深层低渗透多油层砂岩油田受经济产量的限制 ,一般采用 1套层系笼统合采。开发实践表明 ,层系内如层数太多 ,层间非均质性是造成水驱动用状况极不均衡的内在因素。多层合采合注开发效果较差 ,需要研究新的层系组合与划分方式 ,既能满足开发生产对层系细分的需要 ,又能使注采井距达到注水开发的要求。东濮凹陷文东油田属于低渗透多油层砂岩油田 ,油层多达 5 5个 ,在准确认识油藏地质特征及开发特点的基础上 ,以经济效益为前提 ,合理划分与组合开发层系 ,其高效、经济细分层系开发的经验 ,对科学、合理开发同类油田具有借鉴意义。图 1表 3参

Deep, low permeability and multiple-layered sandstone oil fields generally use commingled producing system, due to restrictions in their economic production. The development practice indicated that if the number of layers in a series of strata development is too many, inter-layer heterogeneity will lead to an extreamly uneven oil displacement by water and poor commingled oil production and commingled water injection results. So, it is necessary to study new reservoir zonation methods so as to gear them to the needs of development and production for subdivision of strata, and enable the injection-production well spacing to meet the needs of water flooding development. Wendong oil field of Dongpu sag is a low-permeability and multiple-layered oil field with 55 oil layers. On the basis of accurately undestanding of geologic features and development characteristics, taking the economic benefits as the prerequesition, and making reasonable reservoir zonation and combining the experiences of the effectively and economically subdividing development series of strata, scientific and reasonable development of the oil fields similar to Wendong oil field will be achievable.