CAJ | 학술논문

为了解决沥青质稠油对钻井液的污染问题，从沥青氧化硬化化学反应理论出发，对13种沥青处理剂进行了沥青质稠油硬化试验，优选出硬化剂LYJ 5；并在钻井液中进行了硬化试验，对硬化剂与稠油反应时产生的温度、压力进行了室内试验评估；然后，对沥青质稠油硬化剂进行了现场试验验证。室内试验表明，LYJ 5可以使沥青质稠油的软化点由52℃提高至127℃；在有、无钻井液存在2种情况下，LYJ 5可以将稠油沥青的软化点提高52℃和75℃。在F17井的现场试验表明，应用LYJ 5之后每小时钻井液污染量降低至应用前的19.15％，部分沥青出现硬化聚集现象，使后续的测井和下套管施工更加顺利。综合研究表明，LYJ 5可以大幅度提高沥青质稠油的软化点，显著降低沥青质稠油对钻井液的污染，因而可对沥青层钻进提供强有力的技术支持。
위료해결력청질주유대찬정액적오염문제，종력청양화경화화학반응이론출발，대13충력청처리제진행료력청질주유경화시험，우선출경화제LYJ 5；병재찬정액중진행료경화시험，대경화제여주유반응시산생적온도、압력진행료실내시험평고；연후，대력청질주유경화제진행료현장시험험증。실내시험표명，LYJ 5가이사력청질주유적연화점유52℃제고지127℃；재유、무찬정액존재2충정황하，LYJ 5가이장주유력청적연화점제고52℃화75℃。재F17정적현장시험표명，응용LYJ 5지후매소시찬정액오염량강저지응용전적19.15％，부분력청출현경화취집현상，사후속적측정화하투관시공경가순리。종합연구표명，LYJ 5가이대폭도제고력청질주유적연화점，현저강저력청질주유대찬정액적오염，인이가대력청층찬진제공강유력적기술지지。
To decrease drilling fluid contamination caused by asphaltic heavy oil influx ,a hardening a-gent LYJ 5 was developed based on the chemical theory that asphalt get harder after oxidation .Solidifying test was conducted in drilling fluid environment ,the effect of temperature and pressure on solidifying per-formance was evaluated ,then the selected hardening agent was applied in oilfield .LYJ 5 could increase the softening point of asphalt from 52 ℃ to 127 ℃ and the softening point temperature was raised by 52 ℃ in drill fluid and 75 ℃ without drilling fluid respectively .Its application in Well F17 showed the contaminated drilling fluid volume per hour decreased by 19.15% after adding LYJ 5 ,solidifying and accumulation of as-phalt was observed at outlet ,making wire line logging and casing running smooth .It was concluded from comprehensive study that LYJ 5 could increase the softening point of asphaltic heavy oil significantly ,re-duce the drilling fluid contamination caused by asphaltic heavy oil ,and could guarantee safety drilling in as-phaltic heavy oil bearing formation .