斯伦贝谢公司的OmniSphere可为客户提供一系列先进的、包罗万象的地层岩石力学评估产品，以降低小井眼水平井段的钻井作业风险。

来自丨Schlumberger
编译丨TOM

OmniSphere服务可为客户提供一系列先进的、包罗万象的地层岩石力学评估产品，以降低小井眼水平井段的钻井作业风险。该服务还拥有实力强大的专家团队，可为客户提供完美的测井解释，帮助他们优化完井方案。

OmniSphere RGM小井眼岩石力学随钻测量服务

针对海上/陆地的小井眼定向钻井与地层评价，斯伦贝谢公司开发出OmniSphere RGM小井眼岩石力学随钻测量服务。该服务能够执行井斜角与方位角的连续静态测量、伽马与电阻率测井，适用于5.75英寸或更大尺寸的井眼。利用五个发射器与两个接收器组成的电磁天线阵，可测量多个目标深度的地层电阻率。测井数据的传输速率可达6bps。

OmniSphere RGM服务能够与斯伦贝谢旋转导向系统和随钻测井服务兼容，提供完整的实时地层评价服务，结合QuikSurvey服务，还可简化建井过程。QuikSurvey是该公司专有技术，在开泵循环泥浆时，该技术还能够持续接收测量数据。与传统的停泵测量技术截然不同，该技术在管柱停止旋转时进行测量，因此无需改变泵速即可进行井斜角与方位角的静态测量。

结合QuikSurvey服务，OmniSphere RGM共享了VPWD随钻测压工具的电池电源，可实现停泵时的井斜角与方位角测量，从而进一步缩短测量时间。因此，该服务在提高测井时效(特别是针对高渗透性地层)的同时，显著降低了井壁失稳风险与卡钻事故。

OmniSphere RGM服务的特点是拥有机械与电子部件，在进一步降低故障率的同时，改进了测井数据的采集方法。其耐腐蚀与耐冲击的特点，进一步提高了它在不同钻井环境中的可靠性，包括高温作业。

该技术可用于：小井眼的定向钻井与地层评价；严苛又复杂的钻井环境；边完边钻。

优势

1、缩短测量时间；
2、提高集成MWD的可靠性；
3、避免井壁失稳与卡钻风险；
4、可承受严重冲击与腐蚀性泥浆；
5、无需改变泵速即可实现方位角与井斜角的静态测量。

特点

1、井斜角与方位角的实时、连续静态测量；
2、方位伽玛测量；
3、十个多深度电阻率测量；
4、可选用耐腐蚀的钻铤；
5、更坚固的机械与电子组件，提高了耐用性；
6、QuikSurvey连续循环定向测量服务与停泵测量；
7、可选用抗冲击的、坚固的电子封装。

OmniSphere SGR服务

OmniSphere SGR服务利用光谱伽马射线（SGR）可随钻识别地层的矿物组成，基于粘土类型与地层复杂岩性，可做出岩石力学相关的决策，特别是存在砂泥岩互层的情况下。

实时评价复杂岩性。存在非粘土碎屑或含有放射性矿物的碳酸盐岩的情况下，实时SGR可以避免遗漏储层。总伽马射线谱被分解为三种最常见的天然放射性元素：钾，钍与铀。

非常规油藏的精准导向。通过实时识别钍与钾，OmniSphere SGR服务可基于非常规井中的粘土类型，进行井间对比。利用铀含量，OmniSphere SGR服务可通过识别有机富碳区来辅助地质导向。

实时执行自动环境校正。针对井眼尺寸、偏心率、泥浆类型与比重，OmniSphere SGR测井服务可执行环境修正。它可以检测泥浆中的钾含量，并自动校正，以确保准确测量地层中的钾含量。

通过无源与无电池作业，降低HSE风险并提高作业效率。OmniSphere SGR服务的检波器设计无需中子源即可实现增益调整。OmniSphere SGR服务由MWD工具提供动力，可以连续作业，无需在井场更换电池。

该服务可用于：常规与非常规储层的钻进；大斜度水平井的钻进；粘土类型与岩性的识别。

优势

1、在复杂油藏中实时辅助地层评价与完井决策；
2、通过正确识别含有放射性非粘土矿物质的粘土体积，来提高储层评价的精度；
3、非常规油藏的地质导向；
4、提前执行地层评价，可缩短作业时间。

特点

1、铀、钍、钾含量的实时测量，总伽马射线测量以及无铀伽马射线测量；
2、总有机碳的测量；
3、实时自动环境修正（井壁中的钾含量）；
4、无源与无电池作业。

OmniSphere Slimhole Petrophysics Evaluation-While-Drilling Service

The OmniSphere service provides customers with a family of advanced, all-inclusive petrophysical formation evaluation offerings to reduce drilling risks while drilling, particularly in slimhole horizontal sections. Included with the OmniSphere service is an unmatched domain expertise locally implanted to provide sound interpretation of the widest range of measurements to enable improved completion strategies.

OmniSphere RGM* slimhole petrophysics evalution-while-drilling service

The OmniSphere RGM* slimhole petrophysics evalution-while-drilling service was developed for directional drilling and formation evaluation applications in slim holes—onshore or offshore. Capable of both continuous and static direction and inclination surveying, gamma ray, and resistivity measurements for 5?-in hole sizes and larger, the OmniSphere service measures formation resistivities at multiple depths of investigation using an electromagnetic antenna array of five transmitters and two receivers. Measured data is transmitted at physical rates up to 6 bps with the contingency frame set list feature.

Compatible with Schlumberger RSS and LWD services for complete real-time formation evaluation services, the OmniSphere RGM service incorporates the QuikSurvey service that streamlines the well construction process. This patented service acquires surveys while the mud continues circulation because it triggers a survey when pipe rotation ends rather than when mud pumps cease. The QuikSurvey service eliminates the need to alter the flow rate in order to take a stationary direction and inclination survey.

In combination with the QuikSurvey service, shared power through batteries of the VPWD* collar-mounted verified pressure-while-drilling service enables pumps-off direction and inclination surveys to further minimize surveying time. As a result, the OmniSphere RGM service significantly reduces borehole instability risks and stuck pipe incidents while increasing the efficiency in survey time—especially in highly permeable formations.

The OmniSphere RGM service features mechanical and electronic components that improve survey acquisition methodology while further reducing failure rates. Corrosion- and shock-resistant features further extend service reliability in challenging drilling environments, including hightemperature applications.

APPLICATIONS

Directional drilling and formation evaluation in slim holes
Harsh and complex drilling environments
Casing while drilling (CWD)

BENEFITS

Reduces surveying time
Improves the reliability of the integrated MWD
Mitigates borehole instability risk and stuck pipe
Endures severe shock and corrosive muds
Eliminates need to alter flow rate to enable static direction and inclination survey

FEATURES

Real-time continuous and static direction and inclination surveying
Azimuthal gamma ray
Ten multidepth resistivities
Corrosion-resistant drill collar option
Reinforced mechanical and electronic firmware for enhanced durability
The QuikSurvey* continuous-circulation directional survey service and pumps-off surveying
Optional shock resistance feature with enhanced electronics packaging

OmniSphere SGR service

OmniSphere SGR service uses spectral gamma ray (SGR) to provide while-drilling insight into the mineral composition of formations, enabling petrophysical decisions through clay typing and lithology in complex formations—particularly where sand-shale sequences are present.

Evaluate complex lithologies in real-time

Real-time SGR eliminates missing reservoir layers in the presence of nonclay clastics or carbonates with radioactive minerals. The total gamma ray spectrum is resolved into three most common naturally occurring radioactive elements—potassium, thorium, and uranium.

Place the well accurately and geosteer in unconventional pay

With real-time identification of thorium and potassium, OmniSphere SGR service guides well-to-well correlation through clay typing in unconventional wells. Using uranium content, OmniSphere SGR service aids geosteering through the identification of organic carbon–rich zones.

Perform automated environmental corrections in real time

OmniSphere SGR service measurements are environmentally corrected for borehole size, eccentricity, mud type, and mud weight. It detects the potassium content in the mud and automatically corrects for ensuring an accurate measurements of formation potassium.

Reduce HSE risks and improve efficiency with sourceless and batteryless operation

The detector design of OmniSphere SGR service eliminates the chemical source for gain regulation. Powered by MWD tools, OmniSphere SGR service can be used in back-to-back runs, eliminating the need for changing batteries at the wellsite.

APPLICATIONS

Conventional and unconventional reservoir drilling
High-angle horizontal drilling
Clay typing and lithology

BENEFITS

Aids formation evaluation and completion decisions in real time in complex reservoirs
Enhances reservoir evaluation by correctly identifying clay volume in pay containing radioactive nonclay minerals
Guides and geosteering in unconventional pay
Saves rig time through early formation evaluation

FEATURES

Real-time uranium, thorium, potassium, total gamma ray, and uranium-free gamma ray
Total organic carbon
Automated environmental corrections in real time (for borehole potassium)
Sourceless and batteryless operations