[1]劉小剛 鄧建明.提高渤海中深層機械鉆速技術應用[J].石油鉆采工藝,2018,40(6):706-710.[doi:10.13639/j.odpt.2018.06.006]
 LIU Xiaogang,DENG Jianming.Application of ROP improvement technology in middle and deep strata of the Bohai Sea[J].Oil Drilling & Production Technology,2018,40(6):706-710.[doi:10.13639/j.odpt.2018.06.006]
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提高渤海中深層機械鉆速技術應用
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《石油鉆采工藝》[ISSN:1000-7393/CN:13-1072/TE]

卷:
40卷
期數:
2018年6期
頁碼:
706-710
欄目:
鉆井完井
出版日期:
2018-11-20

文章信息/Info

Title:
Application of ROP improvement technology in middle and deep strata of the Bohai Sea
文章編號:
1000 – 7393( 2018 )06 – 0706 – 05
作者:
劉小剛 鄧建明
中海石油(中國)有限公司天津分公司
Author(s):
LIU Xiaogang DENG Jianming
Tianjin Branch of China National Offshore Oil Co., Ltd., Tianjin 300459, China
關鍵詞:
渤海油田中深層機械鉆速可鉆性鉆井提速
Keywords:
Bohai Oilfield middle and deep strata rate of penetration (ROP) drillability ROP improvement
分類號:
TE52
DOI:
10.13639/j.odpt.2018.06.006
文獻標志碼:
B
摘要:
渤海A 油田主力儲層為太古界潛山地層,巖性為片麻巖,目的層垂深超過4 000 m,上部孔店組地層發育一套礫徑超過7 mm 的含礫砂巖,常規PDC 鉆頭鉆進,鉆頭崩齒嚴重,更換頻繁;牙輪鉆頭機械鉆速低,磨損嚴重,鉆井周期增加導致裸眼浸泡時間加長,上部地層垮塌頻發,嚴重制約油田開發。通過對測井資料回歸并校核巖心強度,確定地層可鉆性級值剖面,為鉆頭優選提供了理論依據,并分析了多種提速工具的優劣。孔店組非均質含礫砂巖地層采用一體化復合沖擊工具,降低了崩齒導致的鉆頭早期破壞;潛山片麻巖地層引入扭沖工具配合忍者齒PDC 鉆頭鉆進有效提高機械鉆速,使單只鉆頭進尺大大增加,實現了渤海中深層鉆井的提速。在A 油田勘探過程中形成了渤海中深層優選鉆頭技術,該技術在鉆井實踐中得到了檢驗, 降低了中深層的開發門檻,實現了勘探開發費用的降低,也為未來渤海中深層油田的開發提供了經驗和技術支持。
Abstract:
The principal reservoir of Bohai A Oilfield is the Archean buried-hill formation and it is lithologically composed of gneiss. The vertical depth of the target layer is over 4 000 m. A set of pebbled sandstones with pebble size over 7 mm are developed in the Kongdian Formation in the upper part. When the conventional PDC bit is used, its teeth are broken up seriously and it is replaced frequently. When the cone bit is adopted, it is wore seriously with low rate of penetration (ROP) and long drilling cycle, which extends the soaking time of open hole, leading to frequent collapse of the upper strata. As a result, the development of the oilfield is restricted seriously. In this paper, the formation drillability grade profile was determined by regressing the logging data and checking the core strength, so as to provide the theoretical basis for bit selection. Then, the advantages and disadvantages of various ROP improvement tools were analyzed. The integrated complex impact tool was adopted in the heterogeneous pebbled sandstones of Kongdian Formation, and consequently the early bit damage caused by tooth breakage was reduced. The torsional impact tool, combined with Ninja-tooth PDC bit was introduced into buried-hill gneiss formation, and consequently the ROP was improved effectively and the single-bit drilling footage is increased significantly. Thus, the improvement of ROP in middle and deep strata in the Bohai Sea is realized. To sum up, the bit selection technology for middle and deep strata in the Bohai Sea is developed in the exploration process of Bohai A Oilfield. This technology is verified in the drilling practice. It decreases the development threshold of middle and deep strata, cuts down the exploration and development costs, and provides the experience and technical support for the future development of middle- and deep-seated oil fields in the Bohai Sea.

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