On September 8, the first batch of five infilled wells deployed in the East Hadedong Sandstone Reservoir in the Tarim Oilfield, PetroChina, were produced steadily. The average daily oil production per well was 60 tons, including the Haeda 4-4-H well. Nissan produced 117 tons of oil, and the cumulative production capacity of five wells was 100,000 tons.
In the past 10 years, the development of the largest desert oil field in the country has increased the annual output of crude oil from 230,000 tons to 2 million tons. It has achieved the target of “2 million tons of stable production†for five years in succession, and accumulated more than 14 million tons of crude oil. As the main reservoir in Hade Oilfield, Donghe sandstone reservoir is a complex reservoir with a large tilt of the oil-water interface. The relationship between oil and water is complex and changeable. With the efficient development of oil reservoirs and the gradual increase of water content, the oil reservoir has entered the mid-water recovery period. The oil-bearing area gradually decreases and gradually becomes fragmented, and the difficulty of mining continues to increase.
In order to improve the local well pattern of the reservoir and optimize the liquid production structure to ensure continuous and stable production and high production, the Hade Oilfield insisted on the "Rolling and Expanding Edge" and "encryption adjustment" to jointly develop the road. Since September 2009, researchers have focused on the management of fine reservoirs, scientifically tracking and groping the dynamics of reservoirs, describing fine oil reservoirs, ascertaining the distribution pattern of remaining oil, and digging the remaining oil between wells, using numerical simulation techniques to optimize Accurately determine the development and adjustment wells.
On February 22 this year, the first well of the Donghe sandstone reservoir in the Hade Oilfield was well-produced with the Well Had 4-32-1. Subsequently, all other four infill wells also achieved high oil production.