A volumetric fracturing method for deep shale gas at atmospheric pressure
A volume fracturing and shale gas technology, applied in the field of oil and gas field exploration and development, can solve the problems of inability to realize volume fractures, reduce flow conductivity, reduce the geometric size of main fractures, etc. , Improve the effect of fracturing success rate
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Embodiment 1
[0092]X exploration well, the present invention is further described in detail, and this well is a typical deep layer normal pressure shale gas well:
[0093] (1) Evaluation of key reservoir characteristic parameters
[0094] Using methods such as mud logging, well logging, and core analysis, the well was evaluated for lithology, mineral composition analysis, sensitivity, physical properties, rock mechanics, three-dimensional in-situ stress, and development of natural fractures.
[0095] (2) Compressibility evaluation and perforation position determination
[0096] Based on the evaluation of geological parameters in (1), the fine compressibility index evaluation of the well along the horizontal wellbore direction was carried out, and the best perforation position was determined.
[0097] (3) Perforation operation
[0098] The spiral perforation method is adopted, the length of each perforation cluster is 1m, the perforation density is 16 holes / m, the phase angle is 60°, and ...
Embodiment 2
[0111] Well Y,
[0112] (1) Evaluation of key reservoir characteristic parameters
[0113] Using methods such as mud logging, well logging, and core analysis, the well was evaluated for lithology, mineral composition analysis, sensitivity, physical properties, rock mechanics, three-dimensional in-situ stress, and development of natural fractures.
[0114] (2) Compressibility evaluation and perforation position determination
[0115] Based on the evaluation of geological parameters in (1), the fine compressibility index evaluation of the well along the horizontal wellbore direction was carried out, and the best perforation position was determined.
[0116] (3) Perforation operation
[0117] The spiral perforation method is adopted, the length of each perforation cluster is 1.5m, the perforation density is 16 holes / m, the phase angle is 60°, and the hole diameter is 10.5mm.
[0118] (4) Acid pretreatment operation
[0119] Displacement 1.0m 3 Under the condition of / min, in...
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