摘要
根据注水井试井公式,演化、推导出注水井压力指数PI(PressureIndex)计算公式,并表明PI值与流量成正比;与渗透率具有双曲线关系;与注入截面面积相关。对PI决策技术在调剖堵水方面的进一步研究证明,通过PI决策整体调剖,能有效地封堵高渗透层或条带,使油藏在平面和纵向上压力指数值基本接近,力求达到储集层在平面和纵向上均质化,改善中、低渗透层(或条带)的吸水状况,提高注入水波及体积和注入水利用率,遏制油田含水上升速度,提高水驱采收率,延长油田稳产期。对广利油田莱38区块的PI决策整体调剖分析和评价,证明无论在各个方面都有较大的改善,油田开发水平明显提高。
PI formula is derived from water injection well test formulae. It shows that PI value is opposite change to formation permeability, thickness, formation coefficient and mobility. It direct proportion rate per day. Throtμgh the research on application of PI decision-making technology in profile and water shutoff, which includes the research on feasibility of using PI decision-making technology in oil field, on mechanism of profile control decision-making technology, on decision-making technology and processes and on the key problems to be solved , the PI decision-making profile control technology has been proved effective to plμg high permeability interval or zone, to make horizontal PI value and vertical PI value alike, to make the reservoir homogeneous in horizontal and vertical direction, to improve homogeneous in horizontal an vertical or zone with middle and low permeability, to increase injection water swept volume and efficiency, to descend oil field water cut increasing rate, to increase water drive recovery efficiency and to prolong oil field stable production time. With the analysis and evaluation of PI decisionmaking technology in the Lai 38 block of the Guangli oil field, it is proved highly in any aspect. The production level of Guangli oil field is improved obviously.
出处
《内蒙古石油化工》
CAS
2005年第8期120-123,共4页
Inner Mongolia Petrochemical Industry
