A block risk technology service, achieving a win-win situation
The reservoir in Block A has a burial depth of 300-320m, an average effective thickness of 6.5m, a porosity of 35%, a permeability of 3600 × 10-3 μ m2, an oil saturation of 66%, and a viscosity of 3527mPa. s for degassed crude oil at reservoir temperature (18 ℃), making it a high porosity and high permeability heavy oil reservoir. Utilizing geological reserves of 453 × 104 tons, with an oil-bearing area of 2.1 km2 and a total of 93 wells, all production was halted in 2003 due to thick oil, sand production, and high water content, resulting in a recovery rate of only 1.9%.
In 2016, the company obtained the right to operate the block through block bidding, used funded technical services, increased oil service fee contract mode, operated the block as a whole, developed a recovery production plan for shut down wells, adopted polymer flooding, viscosity reducer+nitrogen foam huff and puff, precision sand filter screen pipe sand control and other technologies, and restored production of 46 oil wells through workover operations, screw pump oil production and fine production management. Up to now (June 2024), the cumulative oil increase has been 455000 barrels (66571 tons), with an output value of 200 million yuan.
Single well daily oil production curve
Cumulative oil production per well cycle
