Tarim Oilfield Three-Dimensional Drainage & Water Invasion

The Dina 2-17 well in the Tarim Oilfield that adopted the new three-dimensional drainage technology for the first time has an average daily drainage of more than 50 cubic meters and has produced 17.02 million cubic meters of natural gas. meters, realizing the coordinated progress of drainage and gas production, helping to tap the potential of the flooded area of ??the Dina 2 gas field and find a new development model.

The Dina 2 condensate gas field is currently the largest integrated condensate gas field in my country and one of the main gas sources for the West-East Gas Transmission Project. Since it was put into production in 2009, after more than 10 years of development, the problem of water breakthrough in gas wells has become prominent, the number of water breakthrough wells has increased, and the pressure of gas wells has continued to decrease, seriously affecting the stable production of the gas field.

In April this year, Tarim Oilfield adopted new single-well three-dimensional drainage technology for the first time to “race” against the speed of water invasion. For oil and gas wells with large vertical production layer spans and obvious water flooding differences in a single well, the oil and casing separate production process is used to promote three-dimensional drainage and achieve a dynamic balance between drainage and gas production.

Zhang Jianye, director of the Oil and Gas Reservoir Geology Research Institute of the Dina Oil and Gas Management Area of ??the Tarim Oilfield, said: "Through the single-well gas and water recovery model, a single well achieves 'one well for dual purposes'."

The Dina 2-17 well in the Dina oil and gas production management area of ??the Tarim Oilfield was selected to conduct a three-dimensional drainage field test. Well Dina 2-17 is the first potential tapping measure well in the water-flooded area of ??the Dina 2 gas field, with a large vertical span of the production layer. Through the "four-step" process of clearing the wellbore, using longitudinal partitions to segment, running the oil casing separate production completion string, and supporting the separate production process on the ground, the Dina 2-17 well was successfully put into production using three-dimensional drainage technology, providing a good foundation for the Dina 2 gas field. Tapping the remaining oil and gas potential points out the direction and strengthens confidence.

Three-dimensional drainage is a bold attempt in the Dina oil and gas production management area to test new drainage gas production technologies and improve the effect of drainage gas production. With the help of three-dimensional drainage, the Dina 2 gas field has built a "strong drainage of peripheral water-flooded wells and vertical second-line water-carrying production wells". The drainage and production model of "three-dimensional drainage and production control by wells with internal water invasion risk" is of great significance to the research on improving oil recovery in the middle and later stages of the development of Kuqa piedmont water gas reservoirs, and adds "confidence" for the west-east gas pipeline.