Matches in SemOpenAlex for { <https://semopenalex.org/work/W4310359920> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W4310359920 abstract "Abstract Formation drillability evaluation plays an essential role in the exploitation of shale gas reservoirs. Currently, the common methods for evaluating formation drillability mainly include experimental methods, such as scratch tests and micro-drilling tests, and regression analysis. However, the applications of experimental methods and regression analysis cannot reasonably assess drillability due to a lack of well-core information and describe the strong heterogeneity of shale formations. In this study, a data-driven model based on the constrained K-means (CKM) method was proposed to evaluate shale formation drillability, which can solve the problems related to core sample limitation and heterogeneity of the formation. First, a regular evaluation model was built against the conventional cluster methods, such as K-means, DBSCAN, and GMM. Secondly, the closed pairwise constraints were generated based on domain knowledge. Finally, the evaluation model was established by applying pairwise constraints to the K-means clustering generation process. The value of normalized mutual information (NMI) ranges from 0.86 to 0.93 based on the proposed model, which has been improved by 50% over the conventional cluster methods. The results show that the drillability index of the Longmaxi Formation ranges from 5 to 7, whereas the index value of the Wufeng Formation averages at 8-9, which demonstrates that the Wufeng Formation is more difficult to drill compared to the Longmaxi Formation. The drilling practices in the field demonstrated that the actual drilling rate of the Wufeng Formation was lower than that of the Longmaxi Formation, which is in accord with the model predictions. Introduction As an essential unconventional oil and gas resource, shale gas reservoirs have enormous extraction and economic value. Shale drillability characterizes the resistance of shale to drill, which is a crucial type of information requested for the bit type selection, borehole track design (Chen, 2021; White, 1969), and drilling implementation (White, 1969; Chen et al., 2017). Inaccurate evaluation of rock drillability has resulted in a slow drilling rate and severe drill bit wear, leading to procrastination in construction and significant financial losses. Many investigators considered that geomechanical properties (rock type, rock mass jointing), machine parameters (drilling machine type, bit pressure, rotary speed), and operational process determine the drillability of rock (Saeidi et al., 2013; Yetkin et al., 2016). The methods toward getting drillability are majorly implemented in two ways: indoor rock core experimental and numerical model (Gan et al., 2021)." @default.
- W4310359920 created "2022-12-09" @default.
- W4310359920 creator A5022802190 @default.
- W4310359920 creator A5083967505 @default.
- W4310359920 date "2022-11-07" @default.
- W4310359920 modified "2023-09-27" @default.
- W4310359920 title "Intelligent Evaluation on Drillability of Shale Gas Formation in N2 Region of Changning Field in Sichuan, Southwest China" @default.
- W4310359920 doi "https://doi.org/10.56952/igs-2022-181" @default.
- W4310359920 hasPublicationYear "2022" @default.
- W4310359920 type Work @default.
- W4310359920 citedByCount "0" @default.
- W4310359920 crossrefType "proceedings-article" @default.
- W4310359920 hasAuthorship W4310359920A5022802190 @default.
- W4310359920 hasAuthorship W4310359920A5083967505 @default.
- W4310359920 hasConcept C105795698 @default.
- W4310359920 hasConcept C112213829 @default.
- W4310359920 hasConcept C124101348 @default.
- W4310359920 hasConcept C127313418 @default.
- W4310359920 hasConcept C127413603 @default.
- W4310359920 hasConcept C13280743 @default.
- W4310359920 hasConcept C151730666 @default.
- W4310359920 hasConcept C152068911 @default.
- W4310359920 hasConcept C153127940 @default.
- W4310359920 hasConcept C164866538 @default.
- W4310359920 hasConcept C173736775 @default.
- W4310359920 hasConcept C184898388 @default.
- W4310359920 hasConcept C185798385 @default.
- W4310359920 hasConcept C199360897 @default.
- W4310359920 hasConcept C200601418 @default.
- W4310359920 hasConcept C202444582 @default.
- W4310359920 hasConcept C2164484 @default.
- W4310359920 hasConcept C25197100 @default.
- W4310359920 hasConcept C2781101838 @default.
- W4310359920 hasConcept C3018395757 @default.
- W4310359920 hasConcept C33923547 @default.
- W4310359920 hasConcept C41008148 @default.
- W4310359920 hasConcept C73555534 @default.
- W4310359920 hasConcept C76155785 @default.
- W4310359920 hasConcept C78519656 @default.
- W4310359920 hasConcept C78762247 @default.
- W4310359920 hasConcept C9652623 @default.
- W4310359920 hasConceptScore W4310359920C105795698 @default.
- W4310359920 hasConceptScore W4310359920C112213829 @default.
- W4310359920 hasConceptScore W4310359920C124101348 @default.
- W4310359920 hasConceptScore W4310359920C127313418 @default.
- W4310359920 hasConceptScore W4310359920C127413603 @default.
- W4310359920 hasConceptScore W4310359920C13280743 @default.
- W4310359920 hasConceptScore W4310359920C151730666 @default.
- W4310359920 hasConceptScore W4310359920C152068911 @default.
- W4310359920 hasConceptScore W4310359920C153127940 @default.
- W4310359920 hasConceptScore W4310359920C164866538 @default.
- W4310359920 hasConceptScore W4310359920C173736775 @default.
- W4310359920 hasConceptScore W4310359920C184898388 @default.
- W4310359920 hasConceptScore W4310359920C185798385 @default.
- W4310359920 hasConceptScore W4310359920C199360897 @default.
- W4310359920 hasConceptScore W4310359920C200601418 @default.
- W4310359920 hasConceptScore W4310359920C202444582 @default.
- W4310359920 hasConceptScore W4310359920C2164484 @default.
- W4310359920 hasConceptScore W4310359920C25197100 @default.
- W4310359920 hasConceptScore W4310359920C2781101838 @default.
- W4310359920 hasConceptScore W4310359920C3018395757 @default.
- W4310359920 hasConceptScore W4310359920C33923547 @default.
- W4310359920 hasConceptScore W4310359920C41008148 @default.
- W4310359920 hasConceptScore W4310359920C73555534 @default.
- W4310359920 hasConceptScore W4310359920C76155785 @default.
- W4310359920 hasConceptScore W4310359920C78519656 @default.
- W4310359920 hasConceptScore W4310359920C78762247 @default.
- W4310359920 hasConceptScore W4310359920C9652623 @default.
- W4310359920 hasLocation W43103599201 @default.
- W4310359920 hasOpenAccess W4310359920 @default.
- W4310359920 hasPrimaryLocation W43103599201 @default.
- W4310359920 hasRelatedWork W1960618594 @default.
- W4310359920 hasRelatedWork W2002892460 @default.
- W4310359920 hasRelatedWork W2017854965 @default.
- W4310359920 hasRelatedWork W2022049846 @default.
- W4310359920 hasRelatedWork W2086180614 @default.
- W4310359920 hasRelatedWork W2784004946 @default.
- W4310359920 hasRelatedWork W3090650516 @default.
- W4310359920 hasRelatedWork W3198179102 @default.
- W4310359920 hasRelatedWork W3199347919 @default.
- W4310359920 hasRelatedWork W4310359920 @default.
- W4310359920 isParatext "false" @default.
- W4310359920 isRetracted "false" @default.
- W4310359920 workType "article" @default.