吉木萨尔页岩油“下甜点”低成本技术

doi:10.13809/j.cnki.cn32-1825/te.2021.04.009

Abstract

Abstract:

The Permian Lucaogou Formation in Jimsar is rich in continental shale oil reserves. There are two “sweet spot” developed in the vertical direction. As the development progresses advances, the lower “sweet spot” becomes the main development layer. It has the characteristics of large depth and strong heterogeneity, which makes the development difficult. With the impact of market environmental pressure, it is urgent to optimize the stimulation technology to realize the low-cost development of shale oil. Based on the geological characteristics, the methods of numerical simulation, experiments, and fracture monitoring are used to study the cluster spacing, sand-carrying performance of slick water, conductivity of proppant and so on. Then, a series of low-cost tests such as intensive stage, temporary plugging fracturing, quartz sand replacement, and slick water sand injection have been carried out. The application effect showed that the comprehensively use of low-cost stimulation technology can reduce the cost by at least 30 %, meanwhile, maintain the output. It provides a reference for the subsequent development for Jimsar shale oil.

Key words: shale oil, intensive stage, temporary plugging, quartz sand replacement, slick water sand injection, low-cost development

CLC Number:

TE355

Yun XIA,Liping ZHANG,Haoyuan CHU, et al. Low-cost technology of Jimsar shale oil: A case study of lower “sweet spot”[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(4): 536-541.

Figures/Tables 8

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井号	垂深（m）	水平段长（m）	改造段长（m）	钻遇率（%）	孔隙度（%）	饱和度（%）	段间距（m）	平均簇间距（m）	加砂量（m³）	进液量（m³）	排量（m³/min）
J₁	3 524	1 610	1 200	69.5	11.6	64	75.0	14.8	2 321	30 035	12~14
J₂	3 535	1 540	982	74.8	10.3	64	46.8	14.7	1 980	29 015	12~14

Low-cost technology of Jimsar shale oil: A case study of lower “sweet spot”

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