中江气田窄河道致密砂岩气藏高效开发技术

doi:10.13809/j.cnki.cn32-1825/te.2022.02.010

Abstract

Abstract:

Efficient development of Zhongjiang gas reservoir is faced with four difficulties: the meticulous channel depiction, the establishment of high-yield enrichment mode, the formulation with development technology policy, and corresponding engineering fracturing technology. For the narrow channel sand bodies, the multi-domain and multi-attribute fine description and accurate reservoir prediction technology are used, and the spatial distribution characteristics of multi-stage and overlapping channel sand bodies are well described. It can depict the channel sand bodies of the thinnest 8 m and the narrowest 50 m, and the sedimentary time sequence of each channel sand body is also very clear. An improved three-parameter pre-stack inversion technique based on ray parameter domain is used to realize the high-precision quantitative prediction of thin-layer, the predicted error of reservoir thickness and porosity is less than 10 %. By establishing an effective combination model of source rock fault and channel sand, with high ancient and modern structures or high ancient and low modern structures, and good reservoir physical properties, it is expected to obtain high and stable production of gas wells in these areas. By using the techniques of 3D deployment of well groups, well pattern optimization and horizontal well optimization design, the production degree of tight sandstone gas reservoir in narrow channel is greatly enhanced, and the investment cast is saved. By using the integrated horizontal well fracturing technology, the single well test gas production is steadily increased, and the transformation effect is increased to 10.6 times before implementation. High-efficiency development technology of tight sandstone gas reservoir formed by narrow channel enables efficient exploration and development of the Zhongjiang Gas Field, the largest gas field of Sinopec in western Sichuan, with an annual gas production of more than 1 billion cubic meters.

Key words: narrow channel, integration, efficient development, tight sandstone reservoir, Zhongjiang Gas Field

CLC Number:

TE357

Chengchuan LIU,Yongfei WANG,Youyi BI. Efficient development technique of tight sandstone gas reservoir in narrow channel of Zhongjiang Gas Field[J]. Reservoir Evaluation and Development, 2022, 12(2): 345-355.

Figures/Tables 13

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References 23

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渗透率（10^-3μm²）	直井/水平井对比	推荐井型
>5.0	水平井开发效益不明显	直井
1.0~5.0	水平井开发有一定增产效果,但经济效益仍不如直井	直井
0.5~1.0	直井开发可达经济下限标准,水平井开发效益相对较好	水平井
0.1~0.5	直井开发产量偏低,水平井增产效果最佳	水平井
0.05~0.10	直井开发无效益,水平井开发经济效益差	水平井
<0.05	直井、水平井开发均无效益

河道类型		储层类型	河道宽度（m）		有效厚度（m）		有效渗透率（10^-3μm²）
河道类型		储层类型	范围	平均	范围	平均	范围	平均
宽厚低渗型	Ⅰ-A类	Ⅰ	450~1 000	600	20.0~35.0	26.5	0.20~1.25	0.52
宽厚低渗型	Ⅰ-B类	Ⅰ	300~600	400	17.0~26.0	20.2	0.10~1.01	0.41
薄窄/致密型	Ⅱ-A类	Ⅱ	250~530	360	11.0~34.0	23.5	0.02~0.31	0.15
薄窄/致密型	Ⅱ-B类	Ⅰ	220~300	240	8.0~19.6	12.8	0.07~0.65	0.36
高含水致密型	Ⅲ-A类	Ⅱ、Ⅲ			9.3~19.5	14.0	0.03~0.10	0.07
高含水致密型	Ⅲ-B类	Ⅱ、Ⅲ					<0.1

Efficient development technique of tight sandstone gas reservoir in narrow channel of Zhongjiang Gas Field

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