Shengli oilfield
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| shengli oilfield |
The technology for the adjustment of oil flow field in the later stage of high water cut.
In this paper, a quantitative description method of high water consumption layer is formed, and the key technology of flow field adjustment is studied.
Tuo 11 south block on the longitudinal rhythmite note, flat surface turn streamline basins, the unit of nissan 355 tons of liquid drop, nissan increased by 17.7 tons of oil, tons of oil costs fell 142 yuan, is expected to extend the economic life period of 5.4 years.
The technology of deep blocking in the high water-cut stage of the whole oilfield.
Form deep displacement technology step by step, with implementation of extreme high strength resides deep sealing channeling, for strongly watered-out zone "mobility + phase permeability" double regulation, the weak water drive belt to improve the water displacement ratio, contain invalid water injection cycle.
In 2017, 10 well group tests were carried out in a zone of west and gudao oilfield in the isolated east and west regions. As of now, the injection profile has been injected with 67,000 cubic meters, and the pressure has increased by an average of about 1 trillion.
Fault block reservoir injection and mining coupling technique.
In camp 12, the "alternating current and transition streamline" adjustment was implemented: the main line was shut down, the water injection was increased, and the injection was not taken; Production of non - mainstream line well, variable flow line; Select the opening time according to the reservoir pressure coefficient. The oil content of the well group increased by 8 tons, and the moisture content decreased by 11 percentage points.
Ⅲ - 1 type of high temperature and high salt reservoir breakthroughs in polymer flooding pilot test
By improving the Ⅱ type, the molecular weight of polymer powder chemical properties and viscosity to meet the needs of the Ⅲ - 1 type of reservoir.
Wins three 4 polymer flooding pilot test area of the east block moisture content fell by 8.1%, nissan oil increased 1.8 times, has improved recovery 4.8%, forecast to improve oil recovery by 9.5%, than before the polymer injection to reduce unit cost completely more than half.
Low permeability reservoir carbon dioxide miscibility drive development technology.
In 142 is a low permeability reservoir in fan co2 miscible flooding pilot test, gas injection, 47 tons, the well flow pumping, nissan on average 6.3 tons of oil, yield ratio of 3.5 times, well group improved recovery efficiency of 17%.
Effective repair technology of casing damage well.
Research wellbore formation visualization to identify diagnosis, coiled tubing construction, reducing leakage of hydraulic plastic, casing stick wall, wrong to break the centralizer filling, small casing injection-production matching efficient workover technology, the success rate of 90.5%. The construction cycle is shortened 5 days, and the cost is reduced by 20%.
The technique of viscosity and cold recovery of heavy oil reservoirs.
Viscosity drops.
In order to carry out 16 Wells in the heavy oil reservoirs of chenjiazhuang thin layer and the bottom of the water, the average single well is increased by 480 tons, and the moisture content is decreased by 10.8 percentage points, and the input-output ratio is 1:4.
The water is flooded with high water-cut reservoirs.
Four Wells were put into the south block, and the output ratio was more than 1:10.
Block mian 84 in xin 68 sand two endogenous microbial flooding pilot test, the moisture content has fallen by 8.1%, totally 582 yuan/ton cost reduction, forecasting can improve the recovery efficiency 8.5%, input-output ratio of 1:3.4.
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