Efficient deep geothermal resource exploration method
A geothermal resource and deep layer technology, applied in the field of exploration, can solve problems such as the decrease of well completion rate, the accuracy of recommended well location, and the multi-solution interference of data inversion and interpretation results, so as to improve accuracy, reduce development risk, The effect of improving the well completion rate
Active Publication Date: 2020-07-10
BEIJING TALENT NEW ENERGY TECH DEV CO LTD
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Problems solved by technology
[0003] However, it also has technical deficiencies, mainly reflected in the multi-solution and interference of data inversion and interpretation results. The main point related to geothermal resource exploration is that there is uncertainty in the distribution of fault structures in bedrock areas, which reduces the recommended The accuracy of the well location leads to an increase in the risk of geothermal resource development and a decrease in the well completion rate, and even the productivity index of the geothermal well fails to meet the specification requirements
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[0023] Example: such as Figure 1 to Figure 4 As shown, this embodiment provides an efficient deep geothermal resource exploration method,
[0024] Step 1: Determine the hanging wall area of the fault according to the fault structure tendency in the formation;
[0025] Step 2: Determine the location of the exploration hole and the drilling depth in the hanging wall area of the fault according to the fault dip in the formation;
[0026] Step 3: Drilling and logging at the location of the exploration hole;
[0027] Step 4: Analyze the coincidence degree of logging results and geophysical interpretation and determine the location of the mining well.
[0028] In some implementations of this embodiment, the step 2 includes: the length of the exploration hole position from the center position L of the surface fracture must meet: when α<45°, 150
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The invention discloses an efficient deep geothermal resource exploration method. The method comprises the steps of: determining a fault upper wall area according to the fracture structure tendency ina stratum; determining the exploration hole position and the drilling depth in the fault upper wall area according to the fracture dip angle in the stratum; performing drilling to form a well and performing logging at the exploration hole position; and analyzing the coincidence degree of a logging result and the geophysical interpretation and determining the well location. Through adoption of theabove technical solution, the efficient deep geothermal resource exploration method implements the above-mentioned exploration hole construction compared to the prior art to accurately identify the development condition of the target fault structure, thereby improving the accuracy of the recommended production well location, reducing the risk of geothermal resource development and achieving the goal of increasing the well formation rate.
Description
Technical field [0001] The invention belongs to the field of exploration technology, and particularly relates to an efficient deep geothermal resource exploration method. Background technique [0002] my country is rich in geothermal resources. At present, the development and utilization of geothermal resources is very common, mainly used in geothermal power generation, heating, breeding, bathing and medical care. Due to the extremely uneven distribution of geothermal resources in the bedrock area, the mining method basically uses a combination of exploration and production drilling engineering, which has great geological risks and extremely low well completion rates. Therefore, the preliminary exploration work is particularly important. The conventional technical route of exploration is data collection and analysis, geological survey of ground structure traces, geophysical survey and geothermal well drilling construction. Among them, the geophysical survey method usually adopts...
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IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 苏园园叶宏宇董宏亮
Owner BEIJING TALENT NEW ENERGY TECH DEV CO LTD