CAJ | 학술논문

钻井地质参数是钻井工程设计的基础数据，由于地层的复杂性、预测模型的精度以及解释资料的误差等问题，地质参数的解释评价结果误差客观存在，其真值会分布于某区域内。首先提出钻井地质参数不确定性的概率分布和不确定度两种描述方法；然后基于层序地层学、概率统计等相关理论和方法，将同组地层内某段地层作为样本区间，区间内的地质参数作为一组测量样本，建立地质参数不确定性分析及量化描述方法，并基于信息扩散原理确定钻井地质参数的概率分布函数。实例分析表明，建立的钻井地质参数不确定性定量描述及分析结果更切合工程实际。
찬정지질삼수시찬정공정설계적기출수거，유우지층적복잡성、예측모형적정도이급해석자료적오차등문제，지질삼수적해석평개결과오차객관존재，기진치회분포우모구역내。수선제출찬정지질삼수불학정성적개솔분포화불학정도량충묘술방법；연후기우층서지층학、개솔통계등상관이론화방법，장동조지층내모단지층작위양본구간，구간내적지질삼수작위일조측량양본，건입지질삼수불학정성분석급양화묘술방법，병기우신식확산원리학정찬정지질삼수적개솔분포함수。실례분석표명，건립적찬정지질삼수불학정성정량묘술급분석결과경절합공정실제。
The geological features of the rock formation to be drilling in terms of drillability and safety are very important for the drilling engineering design. The description and evaluation of the actual geological parameters are difficult due to the complexity of petroleum geology, the incompleteness of the data obtained and the lack of accuracy of the mathematical models that can be used. In fact, the geo-data obtained should be within a particular region around their actual values. In this paper, the assess-ment methods to describe the uncertainties of the geological parameters in terms of drilling were presented, including the proba-bility distribution and the uncertainty description. The uncertainty analysis and their quantitative description of the geological parameters were conducted based on principles of probability, statistics and stratigraph, in which the geo-parameters were iden-tified and classified in the same groups based on different stratigraphic formations as sample intervals. Then the probability dis-tribution function of the drilling geological parameters was determined based on the information diffusion theory. The methods can make the quantitative description of the drilling geological parameters more relevant to the practical engineering conditions.