Layer | Fill | Outline |
---|
Map layers
Theme | Visible | Selectable | Appearance | Zoom Range (now: 0) |
---|
Fill | Stroke |
---|---|
Collaborating Authors
Results
Abstract This paper discusses the hydraulic fracturing (HF) treatment of a tight gas well owned by a major power service company in India. The objective was to perform a HF treatment on the openhole (OH) section to assess the reservoir potential for future development work. The success of this treatment could unlock the oil and gas reserves in this area of the country, which are estimated to be massive. The fracturing treatment of the tight gas reservoir was to be performed under these conditions for the first time in the area, so there was no previous information to help design the treatment nor predict the result. Injectivity and mini-frac tests were performed to analyze the reservoir properties before designing the final fracturing design and execution. One of the major challenges was to perform the fracturing treatment on an OH section under extremely strenuous operational deadlines, which eliminated the options of using any more suitable well completion methods. Thus, it was proposed to use a diverting agent in the fracturing treatment design to help maximize the stimulated reservoir volume (SRV) in the OH section. The objective was to create at least two to three multiple independent fractures in the OH section. The challenge was to manage the injection rates and deliver the diverter accurately to the bottomhole to create a bridge at the open fracture, isolate it, and initiate a new fracture. This paper discusses this process, and the the lessons learned during the treatment execution. In addition to the description above, the following issues had to be addressed before progressing to the primary fracturing treatment: heavy mud was in the wellbore and OH section, this was a low-permeability reservoir, operator's Christmas tree pressure rating was low, this was a deep well with a long OH interval, there was an extremely short operational execution deadline, and this well's close proximity to an adjacent well, leading to possible communication between the wells. This paper discusses the fracturing analyses performed to design the fracturing treatment, the ideologies used for performing the successful fracturing treatment using diverter technology, and the results achieved using this technique.
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (1.00)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Tight gas (0.76)
- Well Completion > Hydraulic Fracturing > Fracturing materials (fluids, proppant) (0.70)
- Management > Asset and Portfolio Management > Reserves replacement, booking and auditing (0.68)
Abstract Production from coalbed methane (CBM) reservoirs can often be challenging, particularly related to the dewatering process. Improper positioning and completion of wells can lead to increased complications during the production phase. Additionally, consistently high water levels (undeclined static reservoir pressure) can impede gas production. This paper describes well and production information from the Raniganj coal block. The pad completion discussed has a mother vertical well (V-well) in which three main coal seams were completed (of the total five main seams with interspersed local seams), and dewatering commenced in 2009. At the end of 2011, encircling the V-well, four deviated wells (D-wells) at different azimuths were positioned at horizontal closures of 263 to 364 m from the bottom seam of the V-Well, wherein five main coal seams, along with interspersed local seams, were completed and scheduled for dewatering in mid-2012. Despite consistent high water production rates from the V-Well, the water levels in the V-Well stood consistently higher (rising upward) than the water levels in the D-wells, unlike nearby V and D-well pads. Well spacing information, well stimulation plots, perforation plans, and overlying strata for all five wells on this pad were studied and conclusions were drawn. This paper discusses such conclusions as well as the analyses performed to understand these issues. An attempt has also been made to best optimize hydraulic fracturing (HF) treatment designs to obtain the maximum benefits from stimulation operations. The results reported in this paper will influence the operator's cost optimization, which could be a major positive influence on the low-cost CBM market in addition to increasing efficiency of the entire operation.
- Asia (1.00)
- Europe (0.93)
- North America > United States > Wyoming (0.46)
- North America > United States > California (0.28)
- Geology > Structural Geology (1.00)
- Geology > Rock Type > Sedimentary Rock > Organic-Rich Rock > Coal (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- North America > United States > New Mexico > San Juan Basin (0.99)
- North America > United States > Colorado > San Juan Basin (0.99)
- North America > United States > Arizona > San Juan Basin (0.99)
- (12 more...)