孤岛油田层系井网互换油井致效机制及见效模式
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刘海成(1986—),男,江苏盐城人,高级工程师,硕士,从事整装油藏提高采收率研究工作。E-mail:liuhaicheng353.slyt@sinopec.com。

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国家科技重大专项“特高含水后期整装油田延长经济寿命期开发技术”(2016ZX05011-001),中国石化科技攻关项目“特高含水多层系油藏层系互换变流线技术”(P19008-4)。


Study on response mechanism and mode of oil well after layer and well pattern interchange in Gudao Oilfield
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    摘要:

    孤岛油田西区北Ng3-4开展层系井网互换先导试验,通过层系井网互换,改变液流方向,提高波及体积,互换后该区块取得了较好的开发调整效果,但单井实施效果差异较大。采用Tanimoto系数法求解驱替压力梯度和水油渗流速度比2个判识参数场间的向量相似度,引入耗水控制指数评价参数评价变流线致效机制。结合油井见效规律,将油井见效特征归纳为4种模式:即时见效型、滞后见效性、反复见效型和无效型。致效机制研究结果表明,油井互换后所处流线部位及井区油水分布,直接影响互换后油井对现层系的剩余油动用状况及高耗水层带的控制程度,进而影响互换后油井的生产效果。

    Abstract:

    A pilot test of the layer and well pattern interchange was carried out in Ng3-4 strata in the north of the west area of Gudao Oilfield. The layer and well pattern interchange altered the fluid flow direction and increased the swept volume.After the layer and well pattern interchange,the marked results of development and adjustment were achieved in the block,but the results varied greatly between individual wells. The Tanimoto coefficient was used to calculate the vector similarity between the fields of two discriminant parameters,i.e. the displacement pressure gradient and the water-oil seepage velocity ratio,and the water consumption control index was introduced to evaluate the response mechanism of the variable streamline. According to the response characteristics of oil wells,the responses were summarized into immediate response,delayed response,repeated response and no response. The research results of the response mechanism demonstrate that the streamline position of the existing strata where oil wells are located in and the differential distribution of oil and water in the well area directly affect the production status of remaining oil and the control degree of the high water consumption zones through the oil wells after the layer and well pattern interchange. As a result,the production of the oil wells is influenced after the layer and well pattern interchange.

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刘海成.孤岛油田层系井网互换油井致效机制及见效模式[J].油气地质与采收率,2021,28(5):109~115

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  • 在线发布日期: 2021-12-20