摘要
根据鄯善油田注CO_(2)吞吐井组先导试验,分析低渗透低黏度油田特高含水期开展CO_(2)驱油与埋存的注采特征及影响因素。结果表明,鄯善油田发育中—深层油藏,CO_(2)注入呈超临界状态,注入特征与注水类似,存在剖面动用不均和平面突进问题;CO_(2)吞吐生产具有“气态CO_(2)排出阶段、增油生产阶段、逐步失效阶段”的三段式开采特征;3口吞吐井换油率差异较大,增油效果主要受地下剩余油富集程度影响;CO_(2)主要埋存机理为溶解作用和矿化作用,同步埋存率高达95.6%。
Based on the pilot test of the CO_(2) huff-n-puff well group in the Shanshan oilfield,the injection-production performance and the factors influencing CO_(2) EOR and storage in high water cut stage in low-permeability and low-viscosity oilfields were analyzed.The results show that,in the Shanshan oilfield(medium-deep burial reservoirs),the injected CO_(2) stays in a supercritical state,and the characteristics of CO_(2) injection are similar to those of water injection,showing the problems of uneven vertical sweep and planar breakthrough.The CO_(2) huff-n-puff can be divided into three stages:transient gas flowback,oil enhancement,and gradual invalidation.Three huff-n-puff wells vary greatly in oil replacement rate,indicating that the EOR effect mainly affected by the degree of remaining oil enrichment.The main mecha-nisms of CO_(2) storage are dissolution and mineralization,and the simultaneous storage rate can reach as high as 95.6%.
作者
李艳明
刘静
张棚
公学成
马建红
LI Yanming;LIU Jing;ZHANG Peng;GONG Xuecheng;MA Jianhong(PetroChina Tuha Oilfield Company,Research Institute of Exploration and Development,Hami,Xinjiang 839009,China;PetroChina Tuha Oilfield Company,Shanshan Oil Production Management Area,Hami,Xinjiang 839009,China)
出处
《新疆石油地质》
CAS
CSCD
北大核心
2023年第3期327-333,共7页
Xinjiang Petroleum Geology
基金
中国石油科技重大专项(2017E-0407)。
