The Application of SIS Well to the Coalbed Methane Development

2014 ◽  
Vol 1030-1032 ◽  
pp. 1399-1402
Author(s):  
Li Jiang Duan ◽  
Zhao Hui Xia ◽  
Chun Lei Li ◽  
Ling Li Liu ◽  
Chao Bin Zhao ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Optimization Design ◽  
Horizontal Well ◽  
Geological Data ◽  
Vertical Well ◽  
Drilling Equipment ◽  
Successful Technology

SIS well is a successful technology for coalbed methane development. In this paper, the drilling and completion technology were introduced systematically on the aspects of optimization design of well profile, drilling equipment, drilling and completion technology of vertical well and horizontal well, and intersection technique of these two wells. Two new well patterns, i.e., commingled well and boat-shape well were also proposed. When application this technology to other areas, some improvement may should be made according to special geological data.

Development of a Commercial Wireline Retrievable Coring System

1998 ◽  
Vol 1 (06) ◽  
pp. 489-495 ◽  
Author(s):  
Tommy Warren ◽  
Jim Powers ◽  
David Bode ◽  
Eric Carre ◽  
Lee Smith
Keyword(s):  
Economic Evaluation ◽  
Coalbed Methane ◽  
Technical Conference ◽  
The Core ◽  
Core Recovery ◽  
Drilling Equipment ◽  
Original Manuscript ◽  
The Impact ◽  
Conventional Drilling ◽  
Target Depth

This paper (SPE 52993) was revised for publication from paper SPE 36536, first presented at the 1996 SPE Annual Technical Conference and Exhibition, Denver, 6-9 October. Original manuscript received for review 11 October 1996. Revised manuscript received 22 September 1998. Paper peer approved 23 September 1998. Summary A Wireline retrievable coring system for use with conventional drilling equipment is described. The coring system was developed and tested for application in evaluating coalbed methane prospects where a large quantity of core is required, and it is essential that the core is processed soon after it is cut. A drill plug allows for alternation between coring and drilling without tripping the drillstring. The system is particularly advantageous for coring long intervals, multiple zones relatively close together, or when the exact target depth is unknown. The system has been used to core more than 4940 m (15,057 ft) in Poland, Germany, and France, with a combined core recovery of 94%. In addition, the impact of varying rig costs on total savings is factored into the overall economic evaluation of the system. P. 489

Characteristics of Dimensionless Pressure Gradients and Derivatives of Horizontal and Vertical Wells Completed within Inclined Sealing Faults

2021 ◽  
Author(s):  
A V Ogbamikhumi ◽  
E S Adewole
Keyword(s):  
Pressure Drop ◽  
Horizontal Well ◽  
Superposition Principle ◽  
Early Time ◽  
Pressure Gradients ◽  
Vertical Wells ◽  
Pressure Derivative ◽  
Vertical Well ◽  
Dimensionless Pressure ◽  
Horizontal And Vertical Wells

Abstract Dimensionless pressure gradients and dimensionless pressure derivatives characteristics are studied for horizontal and vertical wells completed within a pair of no-flow boundaries inclined at a general angle ‘θ’. Infinite-acting flow solution of each well is utilized. Image distances as a result of the inclinations are considered. The superposition principle is further utilized to calculate total pressure drop due to flow from both object and image wells. Characteristic dimensionless flow pressure gradients and pressure derivatives for the wells are finally determined. The number of images formed due to the inclination and dimensionless well design affect the dimensionless pressure gradients and their derivatives. For n images, shortly after very early time for each inclination, dimensionless pressure gradients of 1.151(N+1)/LD for the horizontal well and 1.151(N+1) for vertical well are observed. Dimensionless pressure derivative of (N+1)/2LD are observed for central and off-centered horizontal well locations, and (N+1)/2 for vertical well are observed. Central well locations do not affect horizontal well productivity for all the inclinations. The magnitudes of dimensionless pressure drop and dimensionless pressure derivatives are maximum at the farthest image distances, and are unaffected by well stand-off for the horizontal well.

Numerical study of multi-branch horizontal well coalbed methane extraction

2018 ◽  
Vol 40 (11) ◽  
pp. 1342-1350 ◽  
Author(s):  
Yongpeng Fan ◽  
Cunbao Deng ◽  
Xun Zhang ◽  
Fengqi Li ◽  
Xinyang Wang
Keyword(s):  
Coalbed Methane ◽  
Horizontal Well ◽  
Numerical Study ◽  
Methane Extraction

scholarly journals The case for enhanced coalbed methane using hydraulic fracturing in the geostructural belt

2018 ◽  
Vol 36 (6) ◽  
pp. 1629-1644 ◽  
Author(s):  
Guozhong Hu ◽  
Chao Sun ◽  
Mingfei Sun ◽  
Wei Qin ◽  
Jianshe Linghu
Keyword(s):  
Hydraulic Fracturing ◽  
Coalbed Methane ◽  
Pressure Control ◽  
Field Investigation ◽  
Gas Production ◽  
Control Flow ◽  
Location Selection ◽  
Vertical Well ◽  
Enhanced Coalbed Methane ◽  
Selection Of

Coal and gas outbursts mostly occur during mining at geostructural belts. Pre-drainage coalbed methane using hydraulic fracturing is one of the methods to prevent outbursts. However, the coal in geostructural belts is to be soft and crushed with special mechanical properties and pore structure. To explore the feasibility of hydraulic fracturing in geostructural belts, a field investigation on enhanced coalbed methane using hydraulic fracturing with vertical well was conducted at the Yangquan Coalfield, China. This case puts forward a method for the location selection of vertical well in geostructural belts. In addition, a triple-control technology for hydraulic fracturing, which is characterized by pressure control, flow control and sand ratio control of fracturing fluid, is presented. The results show that the average gas production and maximum gas drainage capacity of the test well were 5.67 and 12.88 times than those of the regular well, respectively, achieving good drainage effects.

Study on Simulation and Stability Analysis of Subway Station Excavation from the Vertical Construction Well

2011 ◽  
Vol 250-253 ◽  
pp. 1243-1247
Author(s):  
Jin Shui Xie ◽  
Ming Zhou Bai ◽  
Zhao Yi Xu
Keyword(s):  
Optimization Design ◽  
Simulation Analysis ◽  
Research Result ◽  
Ground Surface ◽  
Support Structure ◽  
Vertical Well ◽  
Transfer Station ◽  
Project Optimization ◽  
Main Station ◽  
Support Methods

Beijing subway Huangzhuang stations is cross-transfer station. It has a complex tunneling structure. The characteristics of the reverse construction vertical well was been thinking in the course of excavation design. The vertical well excavation and support method, horizontal wells channel excavation and support methods, the main station pilot tunnel excavation and support methods were researched to determine in detail. In order to analysis and evaluation the feasibility of excavation and getting into hole, FLAC3D numerical simulation analysis method was applied to do simulation of the vertical well, horizontal channel and the main cavern excavation. All detail construction course of these three-part were been studied. Excavation and supporting method and progress were all included. The ground surface subsidence, deformation of support structure and strengthen structure were been got. On the condition of the vertical well support structure destruction caused by the horizontal guide hole excavation and the group cave effect caused by guiding cave excavation in main station underground building, the support structure and ground soil stability were studied. The research result gave the base technical support for the project optimization design and construction security.

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