摘要
针对重复压裂对暂堵剂封堵性能的要求，提出了新型暂堵剂的合成方法，即通过自由基溶液共聚的方法以丙烯酰胺为主要原料，合成了新型的暂堵剂CLS-1。并对合成的暂堵剂的封堵强度、承压能力、热稳定性和返排性能进行评价。实验结果显示：与现场常用的美国暂堵剂DJ—UN相比，同为10000mg／L的浓度，在外加环压为4MPa的条件下，CLS-1与壁面的粘附能力更好，能够承受1．5MPa的突破压力，比DJ-UN具有更好的封堵能力；在60℃条件下，其膨胀比为0．88，大于DJ—UN的0．6的膨胀比，具有更好的稳定性。CLS-1完全溶解后黏度更小，更易返排，是一种性能良好的新型重复压裂暂堵剂。
In view of the requirements of plugging performance for the temporary blocking agent applied in refracturing, this paper presents a synthesized method of new-type temporary blocking agent CLS-1, that is, it is synthesized by using the method to copolymerize the free radical solution and taking acrylamide as the main material and evaluates its block intensity, pressure bearing property, heat stability and flow back performance. The results show that CLS-1 agent possesses much better adhesive force and plugging capacity and moreover can stand 1.5 MPa breakthrough pressure by comparing with American temporary plugging agent DJ-UN used in the field under the same concentration of 10 000 mg/L and the externally added annular pressure of 4 MPa. Under the condition of 60 ℃, the expansion ratio of CLS-1 is 0.88, which is better than that of DJ-UN （0. 6 ） , so it is more stable. After dissolved completely, CLS-1 has smaller viscosity and is easy to flow back, so it is a new temporary plugging agent with very good performance used in refracturing.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第3期111-113,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
暂堵剂
重复压裂
性能评价
temporary blocking agent
refraeturing
performance evaluation
