PetroChina Southwest Oil & Gasfield Company, Chengdu, China

Collaborating Authors

PetroChina Southwest Oil & Gasfield Company, Chengdu, China

A Systematic Approach to Fracture Propagation Simulation with the Integrated Natural Fracture and Geomechanical Model

OnePetroMay, 2023

Abstract In recent years, tight sandstone gas as one of the important types of unconventional resources, has been rapid explored and developed. There are large-scale tight sandstone gas production in Sichuan Basin, Ordos Basin, Bohai Bay Basin, Songliao Basin and other basins, and it has become a key part in the area of increasing gas reserves and production in China. Due to the influence of the reservoir characteristics, tight gas reservoirs have low porosity and permeability, and the tight gas can only be effectively developed by improving the conductivity around the wellbore. Therefore, it is required to perform hydraulic fracturing after the completion of horizontal well drilling to improve the permeability of reservoir. It can be seen that hydraulic fracturing is the core technology for efficient development of tight gas resources. The implementation of hydraulic fracturing scheme directly determines the horizontal well production and EUR. This paper describes the workflow of 3D geomechanical modeling, technical application for Well YQ 3-3-H4 reservoir stimulation treatment, and carries out hydraulic fracture propagation simulation research based on 3D geomechanical model. This paper also compares the micro-seismic data with the simulation results, and the comparison results show that the propagation model is consistent with the micro-seismic monitoring data, which verifies the accuracy of the model. This paper clarifies the distribution law of hydraulic fractures in the three-dimensional space of horizontal wells in YQ 3 block, and the research results can be used to provide guidance and suggestions for the optimization of fracturing design of horizontal wells in tight gas of Sichuan Basin.

OnePetro

doi: 10.2118/214619-MS

SPE

SPE-214619-MS

SPE/IADC Middle East Drilling Technology Conference and Exhibition

Country: Asia > China > Sichuan (0.71)

Genre: Research Report (0.54)

Geologic Time: Phanerozoic > Mesozoic (0.47)

Geophysics: Geophysics > Seismic Surveying > Passive Seismic Surveying > Microseismic Surveying (1.00)

Industry: Energy > Oil & Gas > Upstream (1.00)

Oilfield Places:

Asia > China > Shanxi > Ordos Basin (0.99)
Asia > China > Shaanxi > Ordos Basin (0.99)
Asia > China > Gansu > Ordos Basin (0.99)
(5 more...)

SPE Disciplines:

Well Drilling > Wellbore Design > Wellbore integrity (1.00)
Well Completion > Hydraulic Fracturing (1.00)
Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Tight gas (1.00)
(2 more...)

Technology:

Information Technology > Modeling & Simulation (0.35)
Information Technology > Sensing and Signal Processing (0.34)

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Extended-Reach Well in Shale Formation: What is the Maximum Measured Depth while Coiled Tubing Drilling

Li, Xin (China University of Petroleum, Beijing, China) | Gao, Deli (China University of Petroleum, Beijing, China) | Ren, Rui (PetroChina Southwest Oil & Gasfield Company, Chengdu, China) | Liu, Yongsheng (China University of Petroleum, Beijing, China) | Chen, Xuyue (China University of Petroleum, Beijing, China) | Qi, Jing (China University of Petroleum, Beijing, China)

OnePetroApril, 2017

Abstract The extended-reach well (ERW) and coiled tubing drilling (CTD) have been widely used in the development of shale gas. Although there are numerous advantages of CTD, the extension ability of CTD is restricted since the coiled tubing (CT) cannot rotate in the borehole during drilling process. Generally, the longer horizontal section of the horizontal ERW corresponds to the higher shale gas production. Therefore, we need to predict the ERW's maximum measured depth (MMD) while CTD and evaluate whether the predicted MMD can meet the requirements of shale gas development or not. In this study, a prediction model of MMD for horizontal ERW while CTD in shale formation is presented. The model is established based on the dynamic pressure balance of the bottom hole and the mud weight window of the drilled formation. Three processes of drilling, tripping in and tripping out are considered. The study shows that the buckling of the CT and the decreased pitch length result in a decrease in annular pressure losses, and all of them are conducive to the greater MMD of horizontal ERW while CTD. Moreover, drilling along the direction of minimum horizontal principal stress has a greater MMD in shale formation. In addition, the MMD decreases with the increase in tripping velocity. The annular size also has great effects on the extension ability of CTD. This work provides a practical tool for determining the ERW's MMD while CTD in order to meet the requirements of shale gas development and obtain good economic benefits. The study is significant to the development of shale gas.

OnePetro

doi: 10.2118/188064-MS

SPE

SPE-188064-MS

SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition