method and system of prediction of drilling time using probabilistic analysis method
The present invention provides a drilling period prediction method using a probabilistic analysis method so that the accuracy of drilling period prediction is improved. The method includes: a first step in which a work process by drilling section including drilling rig movement and installation, dri...
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Zusammenfassung: | The present invention provides a drilling period prediction method using a probabilistic analysis method so that the accuracy of drilling period prediction is improved. The method includes: a first step in which a work process by drilling section including drilling rig movement and installation, drilling, circulating, casing, cementing, tripping, and testing is individually separated, input to an input unit, and stored in a database unit such that a drilling hole database is established in accordance with drilling work and a drilling hole section and a database by mining area is established; a second step in which a function distribution method is extracted from data stored in the database unit and a distribution factor with respect to drilling work time of probability distribution by individual drilling section is calculated and stored in the database unit such that a generation range of randomly generated random numbers is set; a third step in which individual probability distribution with respect to drilling work time by individual drilling section depending on the drilling depth is calculated by a calculation unit and stored in the database unit as the random number is generated through a random number generation unit and a Monte Carlo simulation is conducted within the range of the distribution factor stored in the database unit; and a fourth step in which the calculation unit calculates a total predicted drilling work period by adding the drilling work time by individual drilling section and the total predicted drilling work period is stored in the database unit, the total predicted drilling work period required for a drilling work process being predicted through the stored total predicted drilling work period.
시추기간의 예측시 정확성이 개선되도록, 본 발명은 시추작업 및 시추공 구간에 따른 시추공 데이터베이스 및 광구별 데이터베이스가 구축되도록 시추 리그 이동 및 설치, 드릴링, 서큘레이팅, 케이싱, 시멘팅, 트리핑, 테스팅을 포함하는 시추구간별 작업과정이 개별 분류되어 입력부에 입력되고 데이터베이스부에 저장되는 제1단계; 상기 데이터베이스부에 저장된 데이터를 기반으로 함수분포방식이 추출되고, 무작위로 생성되는 난수의 생성범위가 설정되도록 개별 시추구간별 확률분포의 시추작업시간에 대한 분포인자가 산출되어 상기 데이터베이스부에 저장되는 제2단계; 상기 데이터베이스부에 저장된 상기 분포인자의 범위 내에서 난수발생부를 통해 상기 난수가 생성되어 몬테카를로 시뮬레이션이 수행됨에 따라 시추깊이에 따른 개별 시추구간별 시추작업시간에 대한 개별 확률분포가 연산부에 의해 산출되어 상기 데이터베이스부에 저장되는 제3단계; 및 개별 시추구간별 시추작업시간이 상기 연산부에 의해 합산되어 전체 예상시추작업기간이 산출되어 상기 데이터베이스부에 저장되되, 저장된 전체 예상시추작업기간을 통해 시추 작업과정에 소요되는 전체 예상시추작업기간이 예측되는 제4단계를 포함하는 확률론적 분석 방법을 이용한 시추기간 예측 방법을 제공한다. |
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