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- Title
The gas well productivity distribution characteristics in strong heterogeneity carbonate gas reservoir in the fourth Member of Dengying Formation in Moxi area, Sichuan Basin.
- Authors
Hai-jun YAN; Hui DENG; Yu-jin WAN; Ji-chen YU; Qin-yu XIA; Wei XU; Rui-Lan LUO; Min-hua CHENG; You-jun YAN; Lin ZHANG; Yan-wei SHAO
- Abstract
For the gas reservoir of the fourth Member of Dengying Formation in Moxi area, Sichuan Basin, the reservoir space is various, the reservoir heterogeneity is strong and the fluid seepage law is complex. The development process of gas reservoir shows the following characteristics. (1)The gas well has a large difference in productivity, mainly in medium and high production wells. (2)There are great differences in stable production capacity of gas wells, and most of them have strong stable production capacity. (3)Staged acid fracturing technology and special technology wells can greatly improve gas well productivity. In order to find out the distribution characteristics of gas well productivity, gas reservoir engineering research and comprehensive geological research are combined to analyze the distribution characteristics of gas well productivity in the plane. The research shows that the gas well productivity characteristics have obvious subdivision of areas and belts characteristics in the plane. The gas well productivity is mainly distributed in four areas in the plane. The first area is that the thickness of overlying limestone is 0 m. The second area is that the thickness is 0-5 m. The third area is that the thickness is 5-20 m. The fourth area is that the thickness is more than 20 m. At the same time, the fitting formula of gas well productivity and overlying limestone thickness in different regions has been established. On the other hand, gas well productivity is mainly distributed in three belts which include platform edge, platform interior and slop belt. The gas well productivity decreases from platform edge, platform interior to slop belt. The research results can effectively support development area selection, well location optimization in the process of gas reservoir development evaluation and gas well productivity evaluation.
- Subjects
SICHUAN Sheng (China); GAS reservoirs; GAS wells; CARBONATE reservoirs; CARBONATE minerals; LIMESTONE; GAS distribution; GAS engineering; INDUSTRIAL capacity
- Publication
Natural Gas Geoscience, 2020, Vol 31, Issue 8, p1152
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2020.01.001