Pressure Gradient Testing With a New Formation Pressure Testing During Drilling Tool

2004 ◽  
Author(s):  
Matthias Meister ◽  
Jos Pragt ◽  
Arno Buysch ◽  
Johannes Witte ◽  
Gisle Nordahl Due ◽  
...  
Keyword(s):  
Pressure Gradient ◽  
Formation Pressure ◽  
Drilling Tool ◽  
Pressure Testing ◽  
New Formation

Field Experience With a New Formation Pressure Testing-During-Drilling Tool

2004 ◽  
Author(s):  
S. Frank ◽  
V.J. Beales ◽  
S. Dilling ◽  
M. Meister ◽  
J. Lee ◽  
...  
Keyword(s):  
Field Experience ◽  
Formation Pressure ◽  
Drilling Tool ◽  
Pressure Testing ◽  
New Formation

LWD Formation Pressure Testing Allows Decision-Making While Drilling

2006 ◽  
Author(s):  
Ulrich Hahne ◽  
Aravindh Kaniappan ◽  
Jos Pragt ◽  
Arno Buysch
Keyword(s):  
Decision Making ◽  
Formation Pressure ◽  
Pressure Testing

Using Seismic Data to Predict Shale Pore Pressure and Overpressure Sweet Spots: A Case Study from the Lower Silurian Longmaxi Formation in Sichuan Basin, China

2021 ◽  
Author(s):  
Sheng Chen ◽  
Qingcai Zeng ◽  
Xiujiao Wang ◽  
Qing Yang ◽  
Chunmeng Dai ◽  
...  
Keyword(s):  
Prediction Model ◽  
Wave Velocity ◽  
Shale Gas ◽  
Seismic Data ◽  
P Wave ◽  
Formation Pressure ◽  
S Wave ◽  
P Wave Velocity ◽  
New Formation ◽  
Sweet Spots

Abstract Practices of marine shale gas exploration and development in south China have proved that formation overpressure is the main controlling factor of shale gas enrichment and an indicator of good preservation condition. Accurate prediction of formation pressure before drilling is necessary for drilling safety and important for sweet spots predicting and horizontal wells deploying. However, the existing prediction methods of formation pore pressures all have defects, the prediction accuracy unsatisfactory for shale gas development. By means of rock mechanics analysis and related formulas, we derived a formula for calculating formation pore pressures. Through regional rock physical analysis, we determined and optimized the relevant parameters in the formula, and established a new formation pressure prediction model considering P-wave velocity, S-wave velocity and density. Based on regional exploration wells and 3D seismic data, we carried out pre-stack seismic inversion to obtain high-precision P-wave velocity, S-wave velocity and density data volumes. We utilized the new formation pressure prediction model to predict the pressure and the spatial distribution of overpressure sweet spots. Then, we applied the measured pressure data of three new wells to verify the predicted formation pressure by seismic data. The result shows that the new method has a higher accuracy. This method is qualified for safe drilling and prediction of overpressure sweet spots for shale gas development, so it is worthy of promotion.

Using Reservoir Navigation Service and Formation Pressure Testing to Meet Drilling Objectives in Offshore Niger Delta

2019 ◽  
Author(s):  
Victor Imomoh ◽  
Chidi Ndokwu ◽  
Kenneth Amadi ◽  
Oluwaseun Toyobo ◽  
Ikechukwu Nwabueze ◽  
...  
Keyword(s):  
Niger Delta ◽  
Formation Pressure ◽  
Pressure Testing ◽  
Navigation Service

A Success Story of Critical Data Gathering During the Development Phase of Extreme ERD Well Drilling

2021 ◽  
Author(s):  
Atul Kumar Anurag ◽  
Adel Alkatheeri ◽  
Alvaro Sainz ◽  
Khalid Javid ◽  
Yaxin Liu ◽  
...  
Keyword(s):  
Decision Making ◽  
Real Time ◽  
Drill String ◽  
Carbonate Reservoir ◽  
Carbonate Reservoirs ◽  
Development Phase ◽  
Formation Pressure ◽  
Pressure Testing ◽  
Critical Data ◽  
Well Trajectory

Abstract This paper discusses a holistic combination of advanced formation evaluation techniques with pressure testing and reservoir navigation services to mitigate uncertainty related challenges in real time and successfully drill & place ERD laterals targeting Jurassic carbonate reservoirs. A meticulously planned approach to navigate the well trajectory by tracking the desired properties, informed decision-making while drilling and accurate data acquisition for aiding appropriate selection and placement in-flow control device (ICD) in lower completion design and future reservoir management contributed to the success of these complex wells in carbonate reservoirs. The first well in this study, involved drilling and evaluating a long lateral section as single oil producer targeting a carbonate reservoir. While no tar presence was expected, a combination of density, neutron porosity and nuclear magnetic resonance (NMR) logs while drilling resulted in identifying a deficit NMR porosity when compared to density porosity. Deployment of a formation pressure testing while drilling (FPWD) tool enabled measurement of the formation mobility and validate the presence of a tar. Using the same combination of measurements in the subsequent wells for delineating the tar enabled accurate planning of injection wells on the periphery of the field. Approximately 3 days were saved compared to the first well where the drill string had to be POOH to run-in with FPWD service. Hence, having FPWD tool in the same string helped in confirming the formation mobility in real time to call for critical decision making like changing the well trajectory or calling an early TD. Across all the wells drilled in this field, the formation pressure, mobility and porosity measurements provided valuable input for optimum ICD placement and design. Successful identification of unexpected tar resulted in substantial rig time savings, accurate planning of asset utilization and added confidence in design and placement of lower completions by utilizing LWD data. Benefits of integrated data and services combination became clear for applications involving advanced reservoir characterization and enhanced well placement in complex carbonate reservoirs. From the offset wells, a tar was seen in deeper formations but the integration of LWD NMR and mobility data from this well confirmed the presence of a tar within the zone of interest. The study established a cost-effective workflow for mitigating uncertainties related to tar encountered while drilling extreme ERD laterals in an offshore environment where any lost time results in significant increase in expenditures during the development phase. A systematic approach to tackle these uncertainties along with acquisition of critical data for the design & placement of completion results in optimum production from the reserves.

A Study of Influential Factors of Advance Water Injection in Extra-Low Permeability Reservoir

2014 ◽  
Vol 487 ◽  
pp. 255-258
Author(s):  
Jin Gang He ◽  
Kao Ping Song ◽  
Jing Yang ◽  
Bao Gang Sun ◽  
Si Chen ◽  
...  
Keyword(s):  
Pressure Gradient ◽  
Early Stage ◽  
Retention Rate ◽  
Water Injection ◽  
Stress Sensitivity ◽  
Influential Factors ◽  
Low Permeability ◽  
Formation Pressure ◽  
Low Permeability Reservoir ◽  
Start Up

This paper study on the permeability, start-up pressure gradient and stress sensitivity of advance water injection in extra-low permeability reservoir in Fuyu Oil layer of Daqing Oilfield. Experimental results show that the reasonable formation pressure level should be at about 120% in the advance water injection experiment, advanced water injection in the the early stage have higher oil production, the water breakthrough, earlier than synchronous water injection has certain inhibitory effect of water cut rise; Under the premise of advance water injection can overcome the start-up pressure, the lower the level of the reservoir permeability, the higher improve recovery efficiency of the proportion; permeability retention rate increase by about 22% with 5×10-3μm2 core and effectively overcome the stress sensitivity of low permeability reservoir damage; Advanced water injection can overcome stress sensitivity and restoring formation pressure, all that influence the start-up pressure gradient, which significantly reduce the start-up pressure gradient.

Formation Pressure Testing While Drilling in Bohai Bay's Challenging Environment

2006 ◽  
Author(s):  
Ulrich Hahne ◽  
Jos Pragt ◽  
Martin Leonard Venier ◽  
Matthias Meister ◽  
Jenson Jit-Chang Tan ◽  
...  
Keyword(s):  
Bohai Bay ◽  
Formation Pressure ◽  
Pressure Testing ◽  
Challenging Environment

Formation Pressure Testing During Drilling: Challenges and Benefits

2003 ◽  
Author(s):  
M. Meister ◽  
J. Lee ◽  
V. Krueger ◽  
D. Georgi ◽  
R. Chemali
Keyword(s):  
Formation Pressure ◽  
Pressure Testing

Formation pressure testing at the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: Operational summary, history matching, and interpretations

2011 ◽  
Vol 28 (2) ◽  
pp. 478-492 ◽  
Author(s):  
Brian Anderson ◽  
Steve Hancock ◽  
Scott Wilson ◽  
Christopher Enger ◽  
Timothy Collett ◽  
...  
Keyword(s):  
Gas Hydrate ◽  
History Matching ◽  
North Slope ◽  
Formation Pressure ◽  
Pressure Testing
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