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- Title
非均质碳酸盐岩储层差异化控流均衡酸化技术.
- Authors
张合文; 邹洪岚; 丁云宏; 程维恒; 梁 冲; 吴志均; 高成武; 鄢雪梅; 邹春梅; 江良冀
- Abstract
Carbonate gas wells are generally characterized by strong reservoir heterogeneity, long production interval, and open hole or screen pipe completion, so the key to improving the acidizing efficiency of carbonate gas reservoirs, reducing the reservoir stimulation cost and increasing the individual well producing rate is to carry out targeted, differential and balanced acidizing. Taking PetroChina's Right Bank of Amu Darya natural gas exploration and development project which is China's largest natural gas exploration and development project implemented in Turkmenistan as an example, this paper establishes an heterogeneous reservoir damage model of this kind of gas reservoir, and a fractal calculation model of acidizing wormhole and acidizing productivity. Based on this, a differential flow control and balanced acidizing technology is developed by coordinating different acidizing methods. And the following research results are obtained. First, the differential flow control and balanced acidizing technology describes the heterogeneous reservoir damage of carbonate gas well, while considering the uneven damage removal caused by the fractal distribution of acidizing wormholes, so it can reflect the carbonate acidizing more accurately. Second, the differential flow control and balanced acidizing technology not only shows the damage situations of the target interval along the well axis more intuitively, but also optimizes the acidizing parameters specifically section by section, so it can realize differential directional damage removal. Third, after this technology is applied 23 well times in the Right Bank of Amu Darya Gas Field in Turkmenistan, the average daily gas production per well increases by 11×104 m3, and the acid consumption is only 30%-60% that by conventional acidizing, indicating remarkable field application results. In conclusion, the differential flow control and balanced acidizing technology for heterogeneous carbonate reservoirs is a new gas reservoir geologyengineering integrated technology suitable for strong-heterogeneity carbonate gas wells. This technology has achieved remarkable stimulation effect and economic benefit and is worth further promotion and application.
- Subjects
TURKMENISTAN; GAS wells; NATURAL gas prospecting; CARBONATE reservoirs; GAS reservoirs; NATURAL gas; GAS condensate reservoirs; DAMAGE models; VALUE (Economics)
- Publication
Natural Gas Industry, 2023, Vol 43, Issue 9, p112
- ISSN
1000-0976
- Publication type
Article
- DOI
10.3787/j.issn.1000-0976.2023.09.011