Reorganization of mountains and rivers to find vitality in acid fracturing area 12 of Tahe Oilfield

Sinopec News Network News Tahe Oilfield 12, after more than ten years of high-speed development, has entered the middle and late stages.

In this regard, the technical staff of the Northwest Oilfield Petroleum Engineering Technology Research Institute and the Second Oil Production Plant actively tried various methods to find a solution

"Integration" opens up ideas

In the later stage of the development of the block, the remaining oil and unaffected reservoirs are still "rich mines".

After the TH12355 well was put into production, it relied on water injection to replace oil to maintain production, producing 14 tons of oil per day

The technical team carefully combed the well history data in the 12th district of Tahe, looked at the blocks horizontally and single wells vertically, and selected potential single wells to "rescue a tree and cultivate a forest"

At the end of February this year, when the inefficient oil well TH121112CH was screened, the technical team discovered that a second reservoir was developed 100 meters away from the well, and there was plenty of remaining oil, so it formulated a solid delayed acid long-distance acidification plan

"Delayed acid" opens up the oil circuit

With the deepening of development, the oil and gas produced in the vicinity of the well in the old area is getting less and less.

　　To expand the scope of acid fracturing, it is necessary to extend the distance of the acid in the formation

　　The technical staff of the Reserve and Reform Institute jumped out of the limitation of thinking about viscosity increase and slow speed.

　　"The production team" gets through the scene

　　In the past, the Reserve and Reform Institute prepared construction plans indoors

　　Reservoir reconstruction technicians keep a close eye on the site, and control the dosage and quality of the formulations that enter the well based on the pressure and changes in the well

　　This year, the fracturing fluid and acid will be deployed on site, and the technicians can adjust the concentration of the preparation and add the materials according to the specific situation, so as to "see the dishes" more accurately

　　Before the acid fracturing operation of the TH12285 well, the technicians found that the adjacent well had a low pump pressure.

　　The technical staff of the Storage Reform Institute of Northwest Oilfield Petroleum Engineering Technology Research Institute joined the oilfield "production service team".