yang6666ch |
2009-04-05 12:04 |
【果友自选自翻石油英语】之加拿大石油储量分类及定义——摘自加拿大石油协会储委会
(原文)
RESERVES CLASSIFICATION The crude oil and natural gas reserves estimates presented in this report were based on the Canadian reserves definitions and guidelines prepared by the Standing Committee on Reserves Definitions of the CIM (Petroleum Society) as presented in the COGE Handbook. A summary of those definitions is presented below. Reserves Categories Reserves are estimated remaining quantities of oil and natural gas and related substances anticipated to be recoverable from known accumulations, from a given date forward, based on • analysis of drilling, geological, geophysical and engineering data; • the use of established technology; and • specified economic conditions, which are generally accepted as being reasonable, and shall be disclosed. Reserves are classified according to the degree of certainty associated with the estimates • Proved reserves are those reserves that can be estimated with a high degree of certainty to be recoverable. It is likely that the actual remaining quantities recovered will exceed the estimated proved reserves. • Probable reserves are those additional reserves that are less certain to be recovered than proved reserves. It is equally likely that the actual remaining quantities recovered will be greater or less than the sum of the estimated proved plus probable reserves. • Possible reserves are those additional reserves that are less certain to be recovered than probable reserves. It is unlikely that the actual remaining quantities recovered will exceed the sum of the estimated proved plus probable plus possible reserves. Other criteria that must also be met for the categorization of reserves are provided in the COGE Handbook. Development and Production Status Each of the reserves categories (proved, probable and possible) may be divided into developed and undeveloped categories: • Developed reserves are those reserves that are expected to be recovered from existing wells and installed facilities or, if facilities have not been installed, that would involve a low expenditure (for example, when compared to the cost of drilling a well) to put the reserves on production. The developed category may be subdivided PetroKazakhstan Inc. Page 9 Aryskum Field April 14, 2005 McDANIEL & ASSOCIATES Consultants Ltd. into producing and non-producing. • Developed producing reserves are those reserves that are expected to be recovered from completion intervals open at the time of the estimate. These reserves may be currently producing or, if shut-in, they must have previously been on production, and the date of resumption of production must be known with reasonable certainty. • Developed non-producing reserves are those reserves that either have not been on production, or have previously been on production, but are shut-in, and the date of resumption of production is unknown. • Undeveloped reserves are those reserves expected to be recovered from known accumulations where a significant expenditure (for example, when compared to the cost of drilling a well) is required to render them capable of production. They must fully meet the requirements of the reserves classification (proved, probable, possible) to which they are assigned. In multi-well pools it may be appropriate to allocate total pool reserves between the developed and undeveloped categories or to subdivide the developed reserves for the pool between developed producing and developed non-producing. This allocation should be based on the estimator's assessment as to the reserves that will be recovered from specific wells, facilities and completion intervals in the pool and their respective development and production status. Levels of Certainty for Reported Reserves The qualitative certainty levels referred to in the definitions above are applicable to individual reserves entities (which refers to the lowest level at which reserves calculations are performed) and to reported reserves (which refers to the highest-level sum of individual entity estimates for which reserves estimates are presented). Reported reserves should target the following levels of certainty under a specific set of economic conditions: • at least a 90 percent probability that the quantities actually recovered will equal or exceed the estimated proved reserves; • at least a 50 percent probability that the quantities actually recovered will equal or exceed the sum of the estimated proved plus probable reserves; and • at least a 10 percent probability that the quantities actually recovered will equal or exceed the sum of the estimated proved plus probable plus possible reserves. Additional clarification of certainty levels associated with reserves estimates and the effect of aggregation is provided in the COGE Handbook.
(译文:为本人独立翻译,可能有的地方不太准确或有错误之处,尤其是最后一段,供大家讨论)
储量分类
本报告的原油和天然气储量是根据加拿大石油协会储量标准委员会在《COGE手册》中制定的储量定义和准则估算的,相关条款摘录如下:
储量种类
储量是根据预先收集的资料数据估算的剩余石油和天然气数量及相关的预期可采出物数量,资料包括:  钻井、地质、地球物理和工程数据分析;  成熟技术的应用;  指定的合理的、通常可接受的、并将会公司的经济条件; 根据评估确定的等级对储量进行分类:  探明储量是那些能够被估算的有高级别确定可采储量的储量,极有可能实际剩余可采储量将超出估算的探明储量。  控制储量是那些额外的,可采储量的确定性差于探明储量的储量,其实际剩余可采储量可能超出或少于估算的探明与控制储量之和。  预测储量是那些额外的,可采储量的确定性差于控制储量的储量,其实际剩余可采储量是否能超出估算的探明+控制+预测储量的确定性不大。 其它也必须满足的储量分类标准在《COGE手册》中提供。
开发和生产状态
每类储量(探明、控制和预测)可以分为已建产能和未建产能储量:  已建产能储量是那些能够从现有井和已安装设施开采的储量,或者尽管设施未安装,那也只需较低的费用(例如:与钻一口井的费用相比)即可投产。已建产能储量又可分为已投产储量和未投产储量。  已投产储量是那些在评估时可以从已射孔层段直接进行开采的储量,这些储量可能当前正在生产,或者尽管已关井,但它位曾经生产过,并且合理的生产恢复日期可知。  未投产储量是那些现在既未生产,过去也未曾生产的储量,处于未打开状态,并且生产恢复日期未知。  未建产能储量是那些可开采的已知油藏储量,但要形成生产能力需要较大的投入(例如:与钻一口井的费用相比),必须满足被评定的储量类别(探明、控制、预测)的所有需求。 在多井油藏,整个油藏储量划分为已建产能和未建产能,或者将已建产能储量划分为投产和未投产储量是合适的,这种划分应当基于评价者对那些将从油藏中指定的井、设施和完井层段开采的储量的评价、以及各自的开采和生产状态基础之上。
储量报告的水平
参考上述定义,定性水平确定适用于单个的储量体(涉及最低储量计算水平)和储量报告(涉及最高水平的提供储量估算的单个储量体估算的总和),储量报告应该在一定经济条件下达到如下水平:  实际可采储量将等于或超过估算的探明储量的概率至少90%;  实际可采储量将等于或超过估算的探明+控制储量总和的概率至少50%;  实际可采储量将等于或超过估算的探明+控制+预测储量总和的概率至少10%; 《COGE手册》还提供了更多关于储量评估和综合结果的水平确定的说明。
阿果石油网旗下站点:石油文库 | 石油资讯 |石油英才 | 石油供求 | 石油搜索
|
|