Pressure monitoring method used for judging incoming-water-direction of multistage fracturing horizontal well
A pressure monitoring and horizontal well technology, which is applied in the fields of oil and gas production and multi-stage fracturing horizontal well oil production, can solve the problems of not providing the direction of water flow, not considering the interference effect of water injection wells, and poor fitting effect. The operation and method are simple and easy to understand, and the effect of improving production efficiency
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Embodiment 1
[0081] Such as figure 1 As shown, in the injection-production well pattern of vertical well water injection and multi-stage fracturing horizontal well oil production (such as five-point well pattern, seven-point well pattern), the present embodiment takes the five-point well pattern as an example to implement a A pressure monitoring method for judging the direction of water flow in a multi-stage fractured horizontal well, comprising the following steps:
[0082] ①Monitor the bottom hole pressure change data of multi-stage fracturing horizontal wells;
[0083] ②Considering the changes in the working system of the surrounding water injection wells, design the interference test between the water injection wells and the multi-stage fracturing horizontal wells;
[0084] ③Establish the bottom hole pressure analysis chart of multi-stage fractured horizontal wells under the interference of water injection wells;
[0085] ④Fit and analyze the measured bottom hole pressure data to obt...
Embodiment 2
[0135] In this embodiment, a multi-stage fracturing horizontal well is selected in a tight oil reservoir, and the initial fluid production of the multi-stage fracturing horizontal well is 9.9m 3 / d, there are five water injection wells around the horizontal well, respectively numbered water injection well 1, water injection well 2, water injection well 3, water injection well 4, water injection well 5, and their water injection volumes are 30, 20, 25, 20, 15m 3 / d, and the distances from multi-stage fractured horizontal wells are 457, 490, 519, 436, and 600m, respectively. The schematic diagram of the well location is as follows: Figure 4 shown. The pressure monitoring method for judging the direction of water flow in a multi-stage fracturing horizontal well in this embodiment includes the following steps:
[0136] ①Monitor the bottom hole pressure change data of multi-stage fracturing horizontal wells;
[0137] ②Considering the changes in the working system of the surroun...
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