| Northern Shaanxi generally belongs to the low permeability formations or ultra-lowpermeability and this kind of reservoir generally without natural oil production capacity whichall needs to fracturing in order to put into production. Therefore, the purpose of this article isto seek a new fracturing fluid system performance to achieve the goal of shanbei oilfieldproduction increase production.The best formula that is suitable for northern shaanxi formation of low molecular weightpolymer clean fracturing fluid system was got in different temperature through optimizingsystem formula.(1)30℃formula①base:0.5%HJ-2thickener+0.4%crosslinking agentpromoter+0.12%platoon aid+0.1%clay stabilizer+0.2%demulsifier;②crosslinkingagent: organic aluminum, crosslinked than100:3;③breaker: LS-1, mass concentration of1.5%.(2)50℃f ormula①base:0.5%HJ-2thickener+0.2%crosslinking agentpromoter+0.08%platoon aid+0.1%clay stabilizer+0.6%demulsifier;②crosslinkingagent: organic aluminum, crosslinked than100:1.5;③breaker: LS-1, mass concentrationof0.04%.(3)70℃formula①base:0.5%HJ-2thickener+0.2%crosslinking agentpromoter+0.08%platoon aid+0.1%clay stabilizer+0.6%demulsifier;②crosslinkingagent: organic aluminum, crosslinked than100:2;③breaker: LS-1, mass concentration of0.005%. Based on the comprehensive performance evaluation system,the fracturing fluidsystem has good resistance to shear and rheology, the residue content of less sand-carryingability, low cost, completely broken plastic on formation damage small, high salt tolerance,good viscoelastic properties and other excellent performance.Two wells were select to extend sense oilfield company production plant site construction,the entire construction process was completed smoothly and high quality,thus increasingproductivity of oil Wells and bringing to the oil field the economic benefit. This fully showsthat low molecular polymer clean fracturing fluid system has excellent performance and highreliability. |
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