CAJ | 학술논문

南堡潜山油气成藏条件复杂、纵横向非均质性强，为有效地提高裂缝钻遇率和实现经济开发，研究应用了水平井欠平衡钻井技术。针对油层埋藏深、井温高、气油比高、安全密度窗口窄、易漏易涌、安全钻进风险大等难点，通过研究抗高温水包油钻井液体系、气油比对欠平衡工艺影响，监测随钻地层压力与评价储层，设计欠平衡与控压钻进参数，分析南堡潜山钻进过程动静温度变化规律及潜山裂缝钻遇时的各项异常特性规律，形成了一套适合于南堡深层高温潜山水平井欠平衡钻井配套技术。应用结果表明，该技术有效地实现了南堡深层高温潜山安全钻进和经济高效开发，对同类油气藏的钻井施工提供了借鉴。
남보잠산유기성장조건복잡、종횡향비균질성강，위유효지제고렬봉찬우솔화실현경제개발，연구응용료수평정흠평형찬정기술。침대유층매장심、정온고、기유비고、안전밀도창구착、역루역용、안전찬진풍험대등난점，통과연구항고온수포유찬정액체계、기유비대흠평형공예영향，감측수찬지층압력여평개저층，설계흠평형여공압찬진삼수，분석남보잠산찬진과정동정온도변화규률급잠산렬봉찬우시적각항이상특성규률，형성료일투괄합우남보심층고온잠산수평정흠평형찬정배투기술。응용결과표명，해기술유효지실현료남보심층고온잠산안전찬진화경제고효개발，대동류유기장적찬정시공제공료차감。
The reservoir forming condition of buried-hill is complex in Nanpu Oilifeld, and the vertical and horizontal heterogeneity is very strong. In order to effectively raise fracture penetration rate and achieve economic development, underbalanced drilling technol-ogy for horizontal wells was researched and applied. For the following drilling risk situations, such as:deeply buried, high temperature, high gas-oil ratio, narrow density window, prone to lost circulation and well kick, etc, a series of studies are conducted,such as op-timizing a temperature resistant oil-in-water drilling lfuid system, analyzing the gas-oil ratio and the application of real-time pressure monitoring and reservoir evaluation technology, designing the underbalanced and managed pressure drilling parameters, monitoring dynamic and static temperature variation and the abnormal characteristics when drilling buried-hill fracture, a set of underbalanced drill-ing technology was developed for horizontal wells in deep buried-hill reservoirs with high temperature in Nanpu oilifeld. The results of application show that the technology is able to ensure safe drilling and economic development for buried-hill reservoirs in Nanpu Oilifeld, and also to give references for drilling the same type of reservoirs.