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CCDC high performance water-based drilling fluid successful first test

CCDC high performance water-based drilling fluid successful first test

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  China oil network news reporter was informed that in August 18th, the day before the completion of Wei 204HH11-4 wells in cementing operation, marking the type of high performance water-based drilling fluid field test research Chuanqing drilling success, is expected to completely get rid of the bottleneck of shale gas exploration and environmental protection.

  Type II high performance water base drilling fluid is the first comprehensive polymer high performance water base drilling fluid without sulfonation treatment agent, capable of resisting 150 degrees Celsius, underground high temperature and density up to 2.2 grams per centimeter. In May 30th July 14th, drilling fluid into the well, drilled to 5515 meters drilled, then transferred into the well completion, the cumulative time of 69.53 days, by which the level of footage of 2399 meters, 1800 meters long, axcen far east block of shale horizontal Duan Changxin record.

  In order to meet the needs of shale gas horizontal drilling, Chuanqing drilling from the beginning of 2014 have developed high density and strong sealing oil base drilling fluid and type of high performance water-based drilling fluid. In order to meet the environmental protection and the different blocks of high temperature resistance, high density, and the start of August 2016, Chuanqing drilling type high performance drilling fluid research. The research team used more than 1350 sets of experiments in 9 months to complete the indoor formula without using sulfonated treatment agent and degradable environmentally friendly polymer materials. In April this year, CCDC organized experts to conduct rigorous demonstration and evaluation of this system, select the relatively complex geological conditions in East Weiyuan shale gas blocks for field test, to ensure that the value of application of the demonstration area of shale gas. Hu Jing, an engineer involved in research and development, said: "in order to ensure the success of the test, we have made more than 400 sets of on-site review tests and performance maintenance tests at the scene."."

  Water-based drilling fluid system of high performance to solve the drilling in shale oil based cutting processing problem, overcome the type of high performance water-based drilling fluid friction and torque larger problems can also solve the traditional polymer drilling fluid system is the heat problem. "Compared with the type of high performance water-based drilling fluid, drilling process friction decreased obviously, reduce the drilling torque." About this system use effect, Chuanqing drilling 60001 drilling crew instructor Gao Peng said.

  When drilling with this drilling fluid system, the cuttings coming back are flaky and granular. The edges and corners are clear, the mud is cleaner and the borehole is more static. The CCDC R & D leader Li Maosen said: "the same type of high performance water-based drilling fluid, new drilling fluid system has rheology more stable, better run, better plugging anti sloughing three advantages."

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