延安组底水油藏水平井参数优化

 水平井技术在延长油田底水油藏中的应用尚处于矿场试验阶段.目前,在该类油藏实施的几口水平井开发效果差异较大,水平井各项主要技术参数是影响其开发效果的关键.通过定量分析和评价确定水平井主要技术参数的范围及大小,可提高该类油藏水平井的开发效果.在D4927区块油藏地质研究基础上,应用数值模拟方法,对水平井的井网形式、水平段长度、水平段垂向位置、注水时机、配产配注、指标对比等开发参数进行模拟优化,通过考查日产油量、累积产油量、综合含水等主要技术指标,定量分析了优化后的效果,确定了延安组底水油藏水平井参数最优方案.

Parameter Optimization for the Horizontal Wells in Bottom Water Reservoirs of Yan'an Formation

The applications of horizontal well technology in the bottom water reservoirs of Yanchang Oil Field are still at the stage of field test. Presently, the development effects of several horizontal wells in such reservoirs vary greatly. Various technical parameters of horizontal well are the key factors affecting the development effect. For improving the development result of the horizontal well, the range and the size of main technical parameters could be determined by quantitative analysis, many parameters for horizontal well development are optimized in terms of well pattern mode, length of horizontal section, vertical location of horizontal section, timing of water injection, rate prorafion between production and injection, and indicators comparison, etc. The effect is able to be expressed by the quantitative analysis of daily oil production, cumulative production, water cut, etc., and a scheme of optimal parameters is obtained by employing the numerical simulation method based on the reservoir geology study for block D4927, therefore providing a reference and basis for the high efficiency development of horizontal wells in bottom water reservoirs.