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准噶尔盆地吉木萨尔凹陷芦草沟组页岩油上甜点地质工程一体化开发实践 被引量:65

Development practices of geology-engineering integration on upper sweet spots of Lucaogou Formation shale oil in Jimsar sag, Junggar Basin
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摘要 准噶尔盆地吉木萨尔凹陷芦草沟组(P2l)页岩油资源富集、开发潜力巨大。自首口水平井吉172_H井获得产量突破以来,围绕页岩油规模效益开发的目标,对10口水平井开展体积压裂技术攻关试验,但生产效果均未达预期。通过地质工程一体化联合,在确定P2l2 2-2岩屑长石粉细砂岩层为优质甜点目标、明确优质甜点钻遇率是压后高产地质保障的基础上,分析了层理面和高强度泥岩隔层对人工裂缝纵向延伸能力的限制作用,对比了已实施水平井的压裂改造参数差异,提出了水平井密切割、高强度体积改造的提产提效技术对策。2017年部署的开发试验井创造了最高日产108.3t、投产240天累计产油过万吨的新生产纪录;2018年推广试验水平井10口,投产5个月平均日产油量达到30.4t,充分证明水平井密切割、高强度体积改造可以有效提高单井产量,取得较高的开发效益,为吉木萨尔凹陷页岩油的规模开发奠定了扎实的技术基础,提供了有力的工程支撑。 The shale oil resource accumulation and development potential of the Lucaogou Formation(P2l)in Jimsar sag,Junggar Basin are huge.Since the production breakthrough of the horizontal well Ji 172_H,the volume fracturing technology has been tested on 10 horizontal wells with the goal of shale oil scale benefit development,but the production results have not reached the expected level.Through the geology-engineering integration,on the basis of determining the P2l2 2-2 lithic feldspar fine siltstone layer as the high-quality sweet spot and the clear recognition that high-quality sweet spot drilling rate is the geological guarantee of post-fracture high-yield,the restriction from the bedding plane and high-strength mudstone barrier to the vertical extension ability of the artificial fracture are analyzed,the differences of fracturing transformation parameters of the horizontal well which volume fracturing has been implemented are compared,and the technical countermeasures of intensive spacing and high intensity volume fracturing of horizontal wells for improving the production and efficiency are proposed.The development test well deployed in 2017 created a new production record with a maximum daily output of 108.3t and a total production of over 10,000 tons of oil in 240 days.In 2018,10 horizontal wells were put in test and the average daily oil production was 50.4 tons.It is proved that the intensive spacing and high intensity volume fracturing of horizontal wells can effectively improve the single well production and achieve higher development benefits,which lays a solid technical foundation for the scale development of the Jimsar sag shale oil and provides a strong engineering support.
作者 吴宝成 李建民 邬元月 韩乐 赵廷峰 邹雨时 Wu Baocheng;Li Jianmin;Wu Yuanyue;Han Le;Zhao Tingfeng;Zou Yushi(PetroChina Xinjiang Oilfield Company;PetroChina Xinjiang Training Center;China University of Petroleum(Beijing))
出处 《中国石油勘探》 CAS CSCD 北大核心 2019年第5期679-690,共12页 China Petroleum Exploration
基金 中国石油天然气股份有限公司重大科技专项“陆相中高成熟度页岩油勘探开发关键技术研究与应用”(2019E-2606)
关键词 吉木萨尔 页岩油 水平井 体积压裂 优质甜点 Jimsar shale oil horizontal well volume fracturing high-quality sweet spot
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