苏54区块水平井采出程度评价及增产措施研究  

Research on dynamic reserve evaluation and production stimulation measures of horizontal wells in block Su 54

作　　者：兰天庆 李甜甜 王亮 潘占昆 岳斌 李旭 刘鹏程[2] LAN Tianqing;LI Tiantian;WANG Liang;PAN Zhankun;YUE Bin;LI Xu;LIU Pengcheng(Gas Production Plant 4 of PetroChina Changqing Oilfield Company,Ordos Inner Mongolia 017300,China;Exploration and Development Research Institute of PetroChina Changqing Oilfield Company,Xi'an Shaanxi 710021,China)

机构地区：[1]中国石油长庆油田分公司第四采气厂,内蒙古鄂尔多斯017300 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710021

出　　处：《石油化工应用》2021年第9期15-20,共6页Petrochemical Industry Application

基　　金：国家自然科学基金,项目编号:51474070。

摘　　要：苏54区块水平井整体开发区砂体纵向多期叠置,多层系含气且平面展布变化快,单井产量差别较大,为低孔低渗致密砂岩气藏。研究区内水平井生产动态集中体现为单井压力下降快,日产气量递减率高,普遍积液严重,导致该研究区水平井采出程度小,气井动用程度低。为了进一步开采该研究区的剩余储量,本文综合控制储量、动储量及预测累气产量计算,对研究区的剩余储量采出程度进行了评价,结果表明研究区水平井动储量采出程度和最终井均采出程度仅为50.01%、48.81%,可利用的储量空间还有很大。开发对策从两方面入手,已动用区域储量,由查层补孔、井网加密、老井侧钻及排水采气等工艺举措牵头,未动用区域储量则以富集区优选、井网井型优化及储层改造技术优化为主线,双管齐下,为后期提升该区域的整体开发程度提供依据。The sand bodies in the horizontal well development zone of block Su 54 are superimposed in multiple stages in the vertical direction,with gas-bearing multi-layers and rapid changes in plane distribution.The output of single wells varies greatly.It is a low-porosity,low-permeability tight sandstone gas reservoir.The production performance of horizontal wells in the study area is concentratedly reflected in the rapid decline of single well pressure,high rate of decline in daily gas production,and generally serious fluid accumulation,resulting in low production of horizontal wells in the study area and low production of gas wells.In order to further exploit the remaining reserves in the study area,this paper comprehensively controls the reserves,dynamic reserves and predicts the cumulative gas production calculations,and evaluates the degree of recovery of the remaining reserves in the study area.The results show that the degree of recovery of dynamic reserves of horizontal wells in the study area and the final average recovery rate of the wells is only 50.01%and 48.81%,and there is still a lot of usable reserves.Development countermeasures start from two aspects.Regional reserves have been used,led by technological measures such as layer inspection and refilling,well pattern infill,sidetracking of old wells,and drainage and gas production.Unused regional reserves are optimized by enrichment area and well pattern optimization and reservoir transformation technology optimization is the main line,and the two-pronged approach will provide a basis for improving the overall development level of the area in the later period.

关 键 词：致密气藏 采出程度 增产 已动用储量 排水采气 未动用储量 

分 类 号：TE377[石油与天然气工程—油气田开发工程]