Method and system for predicting shale formation pressure
A technology of formation pressure and shale, applied in the field of unconventional oil and gas geophysical exploration and development, can solve problems such as deviation and low prediction accuracy, and achieve the effect of avoiding low accuracy, reliable theoretical basis, and good application effect
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[0027] Example 1
[0028] In this embodiment, the method and system for predicting shale formation pressure according to the present invention may include: step 1, obtaining shale clay content based on logging data; step 2, neutron density intersection method based on dry clay framework, Obtain the first total porosity of the shale; step 3, obtain the second total porosity of the shale based on the empirical model of the shale reservoir based on the acoustic logging data; step 4, based on the first total porosity and the second total porosity , Obtain the total porosity difference; and step 5, obtain the pressure indication value based on the total porosity difference and the clay content.
[0029] This embodiment uses different evaluation techniques to obtain the total porosity of shale, and divides and corrects their difference with the corresponding clay content to obtain the formation pressure indicator curve, avoiding the problem that the difference is caused by the different...
Example
[0049] Application example 1
[0050] To facilitate the understanding of the solutions and effects of the embodiments of the present invention, a specific application example is given below. Those skilled in the art should understand that this example is only for facilitating the understanding of the present invention, and any specific details thereof are not intended to limit the present invention in any way.
[0051] figure 2 It shows a schematic diagram of logging results of a geological high-pressure well according to an embodiment of the present invention. This embodiment deals with and explains the wells whose formation pressure has been determined to be high pressure. Refer to figure 2 The logging results of the method for predicting shale formation pressure according to the present invention are described in detail.
[0052] First, use the logging data of the geological high-pressure well, such as figure 2 As shown, the fifth channel is the clay content channel to obtain...
Example
[0055] Application example 2
[0056] To facilitate the understanding of the solutions and effects of the embodiments of the present invention, a specific application example is given below. Those skilled in the art should understand that this example is only for facilitating the understanding of the present invention, and any specific details thereof are not intended to limit the present invention in any way.
[0057] image 3 A schematic diagram of logging results of a geological atmospheric pressure well according to an embodiment of the present invention is shown. This embodiment deals with and explains the wells whose formation pressure has been determined to be normal pressure. Refer to image 3 The logging results of the method for predicting shale formation pressure according to the present invention are described in detail.
[0058] First, use the logging data of the geological high-pressure well, such as image 3 As shown, the fifth channel is the clay content channel to ...
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