南海X油田测试层产能评价指标分析及校正  

Analysis and Correction of Oil Productivity Evaluation Index of Test Layer in X Oilfield of South China Sea

作　　者：夏欣[1] XIA Xin(Institute of Exploration and Development,SINOPEC Shanghai Offshore Oil &Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院,上海200120

出　　处：《海洋石油》2023年第4期13-17,共5页Offshore Oil

摘　　要：海上断块油田探井测试时存在着不同油嘴下采油指数差异大、井斜及部分射孔影响等状况,矿场产能评价方法虽然简便快捷但不能解决上述问题。针对上述问题,以南海X油田为例,应用公式计算及压力恢复试井解释方法取得分项表皮后,计算出低污染条件下的校正采油指数及米采油指数,并形成米采油指数校正图版,实现了米采油指数快速校正。应用污染表皮与生产压差关系图中的拐点确定出砂层临界出砂压差,应用渗透率与临界出砂压差关系图确定未出砂层临界出砂压差。采油指数的校正及临界生产压差的确定,为本区疏松砂岩油层产能评价提供了依据。该方法能快速取得疏松砂岩油藏探井产能计算参数,对同类油藏产能评价具有借鉴意义。In the test of exploration wells in offshore fault-block oilfields,there are large differences in oil production indexes under different chokes,well deviation and partial perforation effects.Although the field productivity estimation method is simple and quick,it cannot solve the above problems.In view of the above problems,taking the X oilfield in South China Sea as an example,after applying the formula calculation and the pressure build-up test interpretation methods to obtain the partial skin,the corrected oil production index and the specific oil production index under low pollution conditions are calculated,and the specific oil production index correction chart is formed to realize the rapid correction of the specific oil production index.The critical sanding production pressure difference of sand layer is calculated by using the inflection point in the relationship diagram of pollution skin and production pressure difference,and the critical sand production pressure difference of non-sand layer is determined by using the relationship diagram of permeability and critical sand production pressure difference.The correction of oil production index and the determination of critical production pressure difference provide a basis for the productivity evaluation of loose sandstone reservoirs in this area.This method can quickly obtain the productivity calculation parameters of exploration wells in loose sandstone reservoirs,and has reference significance for productivity evaluation of similar reservoirs.

关 键 词：产能评价 表皮系数 米采油指数 临界出砂压差 

分 类 号：TE328[石油与天然气工程—油气田开发工程]