貝克休斯MaxCOR取芯服務可在復雜構造油藏區域取出直徑超過1.5″的大巖芯，使得數據操作人員能夠更準確的評價油氣藏，并實現油氣采收率最大化。
大井壁取芯技術
貝克休斯MaxCOR?服務可采出直徑為1.5″的巖芯，每單位長度體積比標準旋轉取芯設備所取巖芯體積多225%，這一數據使操作人員能夠準確的評價油氣藏，并實現油氣采收率最大化。
快速、可靠和高效的巖芯回收率
MaxCOR儀器是基于最新一代1″直徑取芯工具PowerCOR取芯工具基礎上研發。該服務使用直驅電動機代替傳統的液壓發動機為鉆頭提供動力。高級井下動力管理系統可控制發動機，確保在各種負荷及井眼溫度條件下都保持最大功率傳輸效率。鉆頭轉速比上一代旋轉取芯工具快三倍，極大的減少了取芯時間。
在各種作業條件下，MaxCOR 服務每次下鉆均可回收60個樣品。即使在25000psi高壓、400?F (204?C)高溫這樣極端惡劣的環境下，也能實現的巖芯采收率。
儀器特點和優點
1.每單位長度的體積比標準外徑為1″ 的巖心大225%；
2.獲取高質量、更大直徑的巖芯樣品，進行更準確的分析；
3.單程鉆入回收60個外徑為1.5″的巖芯樣品；
4.服務可靠節省鉆井時間；石油圈原創www.h29736.cn
5.在25000psi高壓和400°F (204°C)高溫下作業；
6.應用直驅電動機具有更高效的能量傳輸效率；石油圈原創www.h29736.cn
7.即使在極端惡劣環境下也有高效的巖芯回收率；石油圈原創www.h29736.cn
8.用更少的取芯時間，高效、高質的取得巖芯。
應用案例
構造復雜地區，我們需要大尺寸巖心或進行特殊巖心分析，從而進行更精確的油藏描述。2010年3月，大井壁取芯服務在巴西深海油田第一次成功測試?？蛻粢笤贑ampos盆地，主要儲層巖石中取芯90顆，作業完成巖芯回收94顆，每顆巖芯取芯用時4分36秒，巖芯最大長度2.5 in. (6.4 cm)，平均2 in. (5.1 cm)。
在隨后的盆地的取芯作業中，兩次下鉆共取芯52顆。 多次作業情況下，巖心采收率達到97%。除了深海作業，該技術成功應用于美國頁巖油氣田作業，包括Eagle Ford, Marcellus, Niobrara, and Bakken等。
來自/Baker Hughes ?譯者/劉鵬 ?編輯/魏亞蒙
Large-diameter Sidewall Coring Technology
The Baker Hughes MaxCOR? service can recover 1 and 1/2in. diameter cores, acquiring core that is 225% more volume per unit length compared to core recovered with standard rotary coring tools. This allows operators to more accurately evaluate reservoirs and maximize hydrocarbon recovery.
Fast, reliable and efficient core recovery
The MaxCOR service is based on the technology developed for the latest-generation 1-in. diameter PowerCOR coring tool. It uses a direct-drive electric motor in place of a traditional hydraulic motor to power the bit. The motor is controlled by an advanced downhole power management system to ensure maximum power transfer efficiency under all load and borehole temperature conditions. The rotational speed of the bit is more than three times than that of the previous-generation rotary coring tools, resulting in significant reduction of coring time.
The MaxCOR service can reliably retrieve 60 samples during a single trip in the well, under a variety of operation conditions. It achieves high core-recovery efficiency even under very hostile environments with pressures up to 25,000 psi and temperatures up to 400?F (204?C).
Features and Benefits
Acquires 225% more volume per unit length than standard 1-in. OD cores
– Large diameter core samples allows for more accurate analysis
Retrieves up to 60 1?-in. OD core samples per run
– Reliable service that saves valuable rig time
Operates in environments up to 25,000 psi and 400°F (204°C)
– High core-recovery efficiency even under hostile environments
Uses a direct-drive electric motor for maximum power transfer
– Consistently retrieves quality core samples with less coring time
Results in the Field
The formation was highly complex and called for SCAL size or larger- sized core samples to provide a more accurate reservoir characterization. In March 2010, the first successful MaxCOR service field tests in a deepwater Brazil field were conducted. The operator requested 90 cores in the Campos Basin, primarily in reservoir rock, and the service recovered 94 cores. The tool drilled each core in an average of 4 min. and 36 sec., with maximum lengths of 2.5 in. (6.4 cm) and an average core length of 2 in. (5.1 cm). During a subsequent field test in the basin, the service successfully completed a 52 core program in two runs. Several more jobs have been run for the same operator, with an overall core recovery efficiency of 97%. In addition to the deepwater work, the service has been used successfully in a number of United States shale plays, including the Eagle Ford, Marcellus, Niobrara, and Bakken.
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- 畢業于中國石油大學（華東），油氣井工程碩士，長期聚焦國內外石油行業前沿技術裝備信息，具有數十萬字技術文獻翻譯經驗。如需獲取更多技術資料，請聯系我們。
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