剑阁气田生物礁气藏特征及早期开发技术对策  

Reservoir characteristics and technological countermeasures in early development:Examples from bioreef gas reservoirs,Jian’ge gasfield

作　　者：冉丽君 罗静 袁港 陈代富 万亭宇 舒润 朱亮 RAN Lijun;LUO Jing;YUAN Gang;CHEN Daifu;WAN Tingyu;SHU Run;ZHU Liang(Northwestern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Jiangyou,Sichuan 621700 China)

机构地区：[1]中国石油西南油气田公司川西北气矿,四川江油621700

出　　处：《天然气技术与经济》2023年第1期37-42,73,共7页Natural Gas Technology and Economy

基　　金：中国石油西南油气田公司科学研究与技术开发项目“剑阁区块礁滩气藏特征及开发技术对策研究”(编号:20220303-12)。

摘　　要：为了推动四川盆地上二叠统长兴组开江-梁平海槽西北部生物礁气藏的勘探开发,以目前处于开发早期评价阶段、开发潜力尚不明确的川西北部剑阁区块为研究对象,分析了气藏的地质特征及主要开发特征,初步形成了气藏开发早期认识及开发技术对策。研究结果表明:①剑阁区块台缘带生物礁储层发育,受相带控制具有一礁一藏的特征,共发育6个独立的气藏;②各个气藏具有储层发育差异大、非均质性强、流体分布复杂等特点,综合分析认为东侧的龙岗A井区储层发育范围大、天然气开发潜力大;③目前生产井仅1口,采速较低,建议调整气井配产,并加快龙岗A井区2口新井的投产进度;④加快外围区剑门D井区以及龙岗B井区高部位滚动部署新井,评价台缘储层发育特征及气水分布规律,获取天然气产能,支撑区块储量申报。结论认为:剑阁区块生物礁气藏储层发育,含气性较好,具有较大的天然气开发潜力,应加大井控程度较低的区域储层预测研究力度,加快新井部署,尽早实现气藏整体开发。These days bioreef gas reservoirs of the Upper Permian Changxing Formation,northwest of Kaijiang-Liangping trough,Jian’ge block,northwestern Sichuan Basin,stay in the early development evaluation stage with unclear exploitation potential.To push ahead their exploration and development,both geological and development characteristics were analyzed to preliminarily form early cognition and technological countermeasures.Results show that(1)extended in platform marginal zones of Jian’ge block,these reservoirs affected by facies belt present some features of one reef and one reservoir.There totally developed 6 independent gas reservoirs;(2)all of them characters great development difference,strong heterogeneity and complex fluid distribution.And reservoirs in Longgang A well block in the east are extensively developed,exhibiting huge development potential;(3)at present,there is only one producer with low yield.It is recommended to adjust its proration and speed up the commissioning on the other two new producers also in A block;and(4)it is suggested to accelerate the progressive arrangement of new wells in high positions of both Jianmen D and Longgang B well blocks in the periphery area and evaluate reservoir characteristics as well as gas-water distribution in the marginal platform,so as to acquire productivity and support reserve declaration.In conclusion,the bioreef reservoirs well developed in Jian’ge block are featured by better gas-bearing property,revealing large exploitation potential.Thus,it is necessary to strengthen the prediction on regional reservoirs with lower well control degree and quicken new well deployment in order to realize an overall development as soon as possible.

关 键 词：开江—梁平海槽 生物礁气藏 气藏特征 技术对策 

分 类 号：TE37[石油与天然气工程—油气田开发工程]