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在巴西,如果设计水平井的试验段的电缆测试不能完全被取代,那么在1214～16in井眼中使用直径8in随钻地层测试仪有重大意义。实践表明,当仅使用随钻测井(LWD)工具时,不需要打水泥塞封堵试验段。成套LWD测试工具大大减少了作业风险,节约了成本。预期减少6天钻机时间和节省90万美元。LWD地层测试仪比电缆测试更容易靠近目标层,防止落物掉进井底。没必要在试验段打水泥塞,而且可更快更有效地完成测井作业。
In Brazil, it is of great significance to use a diameter 8 in while drilling formation tester in a 1214-16 in. Borehole if cable testing of the test section of a horizontal well can not be completely replaced. Practice has shown that when only LWD tools are used, it is not necessary to plug the test section with a cement plug. Complete sets of LWD test tools greatly reduce operational risk and save costs. It is expected to reduce drilling rig time by 6 days and save $ 900,000. The LWD formation tester is easier to get closer to the target layer than cable testing, preventing falling objects from falling into the hole. It is not necessary to apply cement plugs in the test section, and logging operations can be completed more quickly and efficiently.