New progress in fracturing technologies for tight sandstone gas reservoirs in the Sulige Gas Field, Ordos Basin

被引：0

作者：

Ling, Yun ^{[1
,2
]}

Li, Xianwen ^{[1
,2
]}

Mu, Lijun ^{[1
,2
]}

Ma, Xu ^{[1
,2
]}

机构：

[1] State Engineering Laboratory of Low-Permeability Oil and Gas Reservoir Exploration and Development, Xi'an,Shaanxi,710021, China

[2] Oil and Gas Technology Research Institute of PetroChina Changqing Oilfield Company, Xi'an,Shaanxi,710021, China

来源：

Natural Gas Industry | 2014年 / 34卷 / 11期

关键词：

Coiled tubing - Horizontal drilling - Low permeability reservoirs - Gas permeability - Metamorphic rocks - Oil wells - Petroleum reservoir engineering - Tight gas - Packers - Sandstone - Gas industry - Natural gas fields - Fracturing fluids - Gases - Oil well drilling - Multilayers;

D O I：

10.3787/j.issn.1000-0976.2014.11.009

中图分类号：

学科分类号：

摘要：

Characterized by low permeability, low pressure, low yield, high proportion of multilayers and strong heterogeneity, the Sulige Gas Field, Ordos Basin, has become one of the main development blocks of the Changqing gas zone. In order to further enhance development benefit, a study was conducted on key fracturing technologies in the 12th Five-Year Plan period, a series of new progress in which was summarized as follows. (1) Two main technologies, hydrajet fracturing and open-hole packers, were developed for multi-staged fracturing of horizontal wells, and at the same time, speed-drilling composite bridge plugs and repeatedly-opened/closed sliding sleeves were developed, which have broken the monopoly of foreign technologies. (2) Three major technological series were developed for the multilayer fracturing of vertical wells, including mechanical packers, casing sleeves and coiled tubings. (3) Three sets of low-damage fracturing fluid systems were developed. (4) A significant progress was made in the SRV fracturing of horizontal wells and slim-hole development tests. Key fracturing technological series was established for tight gas reservoirs, so dramatic improvement was made in the technological capability (vertical-well multi-layer fracturing increased from 3 to 11 layers, and hor izontal-well multi-stage fracturing increased from 5 to 23 stages), which greatly improved the yield of a single well. These achievements provided an important technical support for the efficient production development of tight sandstone reservoirs. According to the requirements of 50 million tons oil and gas equivalent of stable production, and with the goals to further enhance single-well production and minimize development costs, technical difficulties were required to be overcome in the following three aspects: horizontal-well SRV fracturing, industrialized fracturing, and re-fracturing of the existing production wells. ©, 2014, Natural Gas Industry Journal Agency. All right reserved.

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页码：66 / 72