摘要
用阴-非离子表面活性剂制备了酸/油型微乳液,初步优选了配方。在常压下对比了盐酸、Hoefner 的酸/油微乳液、Phillips 的稠化酸及作者所配制的酸/油微乳液与大理石之间的反应速率。结果表明,本文所提出的微乳液体系的酸化速率最小。考察了钙离子对反应速率的影响。用支撑液膜研究了氢离子在微乳液中的传递机理。所配制的微乳液体系可用于砂岩油层的基质酸化或压裂酸化。
Two series of anionic-nonionic surfactants,alkylphenyl polyoxyethylene ether phos- phates (OPP-n) and sodium salts of carboxymethyl alkylphenyl polyoxyethylene ethers (OPC-n) where n denotes the average EO number in molecule,are used to prepare the acid/oil microemulsions for acidizing.Through component screening tests a work formu- lation of acidizing microemulsions is established:13.0% OPP-10,3.0% OPC-25,30.0% n-hexanol,36.7% kerosine,and 18.3% 15%-concentrated hydrochloric acid.This micro- emulsion reacts with marble at 30℃ and atmospheric pressure with the lowest acid spend- ing rate as compared with Hoefner's microemulsion (on N-chlorohexadecyl piridine) of similar composition and Phillips' viscosified (by 1% DSGA) acid.Calcium ion acceler- ates the acid/marble reaction and the suggested microemulsions can tolerate up to 0.69% Ca^(++).No aqueous phase would be separated from the microemulsions until all acid in them exhausted.The acid/oil microemulsions can be recommended for both matrix and frac acidizing in depth.The transmission of hydrogen ion in the microemulsions is investigated by using a liquid film supported by solid (SLMS) technique.The mechanism “transmission by exchange” is suggested:OPP-6 molecules in aqueous and oil phases and in adsorpted layers are constantly exchange each with other and create in adsorpted layers temporal passages for hydrogen ion to duffuse through.
出处
《油田化学》
CAS
CSCD
北大核心
1992年第2期122-128,共7页
Oilfield Chemistry
关键词
微乳状液
酸化液
Anionic-Nonionic Surfactants
Microemulsions
Acidizing Fluids
Retarded Acids
Laboratory Performance Evaluation
Acidizing
Hydrogen Ion Transmission
