悬浮煤粉低伤害压裂液体系研究与应用

为了提高煤层气储层改造效果,针对煤层气井在开发过程中产出煤粉并对储层造成伤害等问题,采用正交实验优化配方的方法,开展室内实验研究优化悬浮煤粉的压裂液体系配方,并进行现场试验等方面工作.研究结果表明,采用0.2％g+0.2％b+0.1％FP-2复配悬浮剂配方,对煤粉的悬浮率达到27.33％,采用2％KCl作为防膨剂,防膨...

Research and application of low damage fracturing fluid system for suspended pulverized coal

In order to improve the coalbed methane reservoir reconstruction effect,in order to solve the problems of producing coal powder and causing damage to the reservoir during the development of coalbed methane wells,orthogonal experimental optimization formulas were adopted to conduct laboratory experiments to optimize the fracturing of suspended coal powder.Fluid system formulation,and field work.The research results show that using 0.2%g+0.2%b+0.1%FP-2 compounded suspending agent formula,the suspending rate of pulverized coal reaches 27.33%,and 2%KCl is used as the anti-swelling agent.With 0.1%concentration of drainage aid,the surface tension of the system is 23.21 mN/m,and the damage rate of the system to the core of coal rock matrix is 17.60%.The field application has improved the coalbed methane reservoir fracturing and transformation effect in Liulin block,Shanxi.The initial daily gas production increased by 24.5%,the average cumulative production increased by 27.6%,and the average transformation effective period was extended by 18.4%.The recognition of the above results can provide a strong technical guarantee for fracturing production in the development of coalbed methane.