石油钻采工艺
石油鑽採工藝
석유찬채공예
Oil Drilling & Production Technology
2015年
5期
22-25
,共4页
孔华%兰凯%刘明国%晁文学%朱军%张敏
孔華%蘭凱%劉明國%晁文學%硃軍%張敏
공화%란개%류명국%조문학%주군%장민
东濮凹陷%阶梯水平井%大落差%断块油气藏%轨道优化%管柱下入能力
東濮凹陷%階梯水平井%大落差%斷塊油氣藏%軌道優化%管柱下入能力
동복요함%계제수평정%대락차%단괴유기장%궤도우화%관주하입능력
Dongpu depression%stepped horizontal well%large drop%fault block reservoirs%well-path optimization%string running capacity
为了降低东濮凹陷断块油气藏大落差阶梯水平井管柱下入摩阻，开展了大跨距阶梯水平井轨道优化研究。考虑地层实际造斜能力，优化了造斜段的靶前位移和造斜率；建立了带封隔器（或扶正器）的完井管柱下入摩阻模型，优化了阶梯过渡段的井眼曲率和位移差。分析表明，造斜段靶前位移控制在300~400 m，造斜率先低后高，适当降低阶梯过渡段造斜率和位移差，有利于降低钻进和管柱下入摩阻。设计成果在东濮凹陷4口阶梯水平井中应用，阶梯着陆中靶率100%，储层钻遇率最大95.3%，水平段最长达到1214 m，断块落差控制范围7.14~40.3 m。应用结果表明，采用分段评估的方法优化阶梯水平井轨道参数具有针对性和全面性，为同类型阶梯水平井的设计提供了借鉴。
為瞭降低東濮凹陷斷塊油氣藏大落差階梯水平井管柱下入摩阻，開展瞭大跨距階梯水平井軌道優化研究。攷慮地層實際造斜能力，優化瞭造斜段的靶前位移和造斜率；建立瞭帶封隔器（或扶正器）的完井管柱下入摩阻模型，優化瞭階梯過渡段的井眼麯率和位移差。分析錶明，造斜段靶前位移控製在300~400 m，造斜率先低後高，適噹降低階梯過渡段造斜率和位移差，有利于降低鑽進和管柱下入摩阻。設計成果在東濮凹陷4口階梯水平井中應用，階梯著陸中靶率100%，儲層鑽遇率最大95.3%，水平段最長達到1214 m，斷塊落差控製範圍7.14~40.3 m。應用結果錶明，採用分段評估的方法優化階梯水平井軌道參數具有針對性和全麵性，為同類型階梯水平井的設計提供瞭藉鑒。
위료강저동복요함단괴유기장대락차계제수평정관주하입마조，개전료대과거계제수평정궤도우화연구。고필지층실제조사능력，우화료조사단적파전위이화조사솔；건립료대봉격기（혹부정기）적완정관주하입마조모형，우화료계제과도단적정안곡솔화위이차。분석표명，조사단파전위이공제재300~400 m，조사솔선저후고，괄당강저계제과도단조사솔화위이차，유리우강저찬진화관주하입마조。설계성과재동복요함4구계제수평정중응용，계제착륙중파솔100%，저층찬우솔최대95.3%，수평단최장체도1214 m，단괴락차공제범위7.14~40.3 m。응용결과표명，채용분단평고적방법우화계제수평정궤도삼수구유침대성화전면성，위동류형계제수평정적설계제공료차감。
In order to reduce the friction when running string in stepped horizontal wells in the fault block reservoir with large drop in the Dongpu depression, studies on optimization of well-path of stepped horizontal well with large span were carried out. Given the actual angle building rate of the formations, the pre-target displacement and build-up rate of the building up section were optimized. A model for analyzing the running friction of completion string with packer (or centralizer) and stress was built, and the wellbore curvature and displacement difference of the stepped transition interval was optimized. Analysis shows that, when the pre-target displacement at building up section is controlled at 300~400 m, the building rate is low ifrst, then becomes high. Properly reducing the building rate and displacement difference of the stepped transition interval help reduce drilling friction and string running friction. The design result was used in four stepped horizontal wells in Dongpu Depression, the targeting rate of stepped landing was 100%, the maximum reservoir encountering ratio was 95.3%, the maximum horizontal section was 1 214 m, and the drop difference of faulted block was controlled at 7.14~40.3 m. The result of application indicates that the use of staged assessment method to optimize the parameters of stepped horizontal well track is pertinent and comprehensive and provides reference for the design of similar stepped horizontal wells.
