Benefit is the soul of development. In 2019, No.3 Oil Production Plant established a "pond model" for benefit screening, and lined up and screened measures to increase reserves and increase production according to benefit standards, so that low-cost production and reserves took the lead and greatly improved development benefits.
The cost of implementing the four "whether" pressure drops is 30 million yuan.
In 2019, the deployment of new wells in No.3 Oil Production Plant shrank sharply, and the stable production turned to the stage of relying on old wells, and the workload of measures surged.
"We have established a measure evaluation mechanism, and the geological, engineering and financial personnel are closely combined to screen each production measure according to the criteria of’ whether the old well is opened, whether gas injection is performed, whether measures are taken, and whether maintenance is supported’." Zhou Qingyang said.
Well TH10432 was originally planned to deploy a well near the fracture to improve the overall reserves utilization in the well area. When technicians evaluated the economic benefits of the operation, the scheme was marginal, and the reserves around the well were adjusted in time to start with acid fracturing, so that the well changed from a low-yield well with insufficient liquid supply to a high-yield well with continuous flowing production, saving 80% compared with the original planned investment.
From January to December, through the benefit screening mechanism, the plant suspended 8 rounds of low-benefit gas injection, took 27 high-cost measures and reduced the pressure by 31.25 million yuan.
Increasing reserves at low cost and realizing hard stability of recoverable reserves
"SEC recoverable reserves are the basis for the sustained and stable production of oil fields. We have greatly reduced the potential tapping means of high-cost reserves such as large-scale fracturing through benefit screening, and upgraded the potential tapping measures of low-cost reserves with" water injection and gas injection "as the core, which not only controlled the cost, but also made the annual SEC reserve replacement rate reach 100%." Zhou Qingyang said.
In 2019, the plant decomposed the new SEC reserve target into blocks through benefit screening and into water injection, gas injection and measures, and initially formed a low-cost management system for increasing SEC reserves in blocks.
From January to December, in view of the well control unexploited reserves, the SEC reserves were increased by 330,000 tons through water injection. In view of the low production reserves of well control, the benefits are improved by gas injection, and the SEC reserves are increased by 420 thousand tons; In view of the lost reserves, measures were taken to find a breakthrough and increase the SEC reserves by 300,000 tons. The replacement rate of SEC reserves was 100% in the whole year, in which the old wells contributed 90.18% of SEC reserves.
Systematic screening, whole chain optimization, cost reduction and efficiency creation
"To solve the same problem, there can be multiple schemes. Which scheme is the most effective must be systematically analyzed and screened." Zhou Qingyang analyzed, "The whole value chain control can be realized only if the injection-production-transportation processes are connected, the materials of underground oil and gas reservoirs are connected, and the multi-discipline cooperation in operation is established."
In the water injection business chain, the plant optimizes the water injection mode according to the benefit-oriented principle, which is to inject water into the pipe network first, then the unit pump, then the electric drive pump truck, and then the diesel drive pump truck. From January to December, the proportion of water injection for unit pumps increased by 9% year-on-year, and that for diesel-driven pump trucks decreased by 7% year-on-year. At the same time, the price of water injection for unit pumps was lowered by 11.25% according to the principle of "increasing quantity and decreasing price".
In the gas injection business chain, the whole chain optimization work was carried out in seven aspects: geological optimization, preparation optimization, production optimization and abnormal optimization, which reduced the proportion of gas injection linkage cost by 3% in the whole year and made the value chain management and control achievements outstanding. (Ma Jinglin)