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- Arps decline curve is basic mathematic model used for studying oil/gas production decline regularity at present, but it has some defects. Arps递减曲线是目前用于研究油气产量递减规律的基本数学模型;但该模型仍有一些不足之处.
- Arps equation,a optimun fitting of production decline curve analysis of oil and gas reservoirs is presented in this paper. Arps方程的推导,提出了油气藏产量递减曲线分析的最佳拟合法。
- Traditional Arps production decline analysis method requires to determine the initial time, production and decline ratio before analyzing. 传统的Arps产量递减分析方法要求事先选定递减规律的初始时间、初始产量及初始递减率，事实上这些参数是很难确定的。
- Based on production decline curve equation, through mathematical derivation, a kind of logarithmic type production decline curve equation is obtained. 在产量衰减曲线方程的基础上，通过数学推导，得到了一种对数型产量衰减曲线方程。
- Rome) Sixty-one governmental officials will meet next week in Bangkok to discuss the tendency of the world's rice production decline that is increasingly becoming a concern . 法新社罗马电)六十一个国家的政府官员下周将在曼谷集会，讨论日益令人关切的全球稻米产量下降趋势问题。
- To study the production decline is very significant for the later adjustment, production prediction and recoverable-reserves rechecking during a gas reservoir development. 产量递减规律的研究对搞好气藏开发后期调整，产量预测及可采储量复核都有重要意义。
- For waterflooding oilfields, the methods for prediction of recoverable re-serves include water drive curve, production decline, forecast model and numerical simulation. 然而，当油气田业已进入递减阶段之后，产量递减法则是最为重要的预测方法。
- A production decline model which is fit for water huff and puff well is established based on the in-site production data and imbibition experiment in lab. 并根据矿场生产动态数据和室内渗吸实验,建立适合于注水吞吐井的产量递减模型。
- But from the production history of the individual well in the block, most of the wells have such problems as short stable production period and quick production decline. 但从该区块单井的生产历史来看,大部分井存在稳产时间短、递减快的问题。
- TheCommerce Department revealed that during the last three months of 2008, itsgross domestic product decline at an annual rate of 6.2%, the sharpest fallingin 25 years. 商务部指出，2008年的最后三个月，国内生产总值以每年6.;2%25的速度下降，是25年来最急剧的下滑。
- On the basis of Arps fundamental production decline law, a simple and reliable analysis method of production decline was presented, and the linear relationship between cumulative production rate and time in log coordinate system was developed. Arps基本的递减规律出发;提出了一种新的简单可靠的分析产量递减的方法.;该方法在对数坐标中建立了累积产量与时间的线性关系
- Based on the analyses of Arps production decline law and changes of remaining reserve-production ratio. a simple and convenient method for estimating decline factors and recoverable reserves during decline period in any oil- field was presented. 通过对Arps产量递减规律与油田剩余储采比变化规律关系的分析，给出了一种计算递减期油田递减指数与可 采储量的简便方法。
- Through choosing referential time, production and decline ratio, this method is more flexible, simple and practical than the Arps method in terms of analyzing the production decline. 通过选用参考时间、参考产量和参考递减率，使得递减分析方法具有一定的灵活性和优越性、该方法简便、实用。
- After the gas field has entered into the production decline stage , its decline law can be studied by use of the typical curve fitting method or coordinate transform method through Arps hyperbolic decline equation generally . 气田进入产量递减期后 ,一般通过Arps递减方程 ,应用典型曲线拟合或坐标变换法来研究递减规律。
- Lai Enna said: "The people are most concerned about is that Apple's high-end products decline. 莱恩纳说：“人们最担心的是，苹果高端产品出现颓势。
- There are some results as below:(1) With mathematical model improvement of unsteady porous flow, new theoretical typecurves are plotted which can enlarge Arps production decline curves from leaky boundaries. 通过数学模型和分析计算得到了以下认识和结果:(1)改进了直井不稳态产能分析渗流数学模型,求解后形成了新的理论图板。
- AFP report from Rome) Sixty-one governmental officials will meet next week in Bangkok to discuss the tendency of the world's rice production decline that is increasingly becoming a concern . 法新社罗马电)六十一个国家的政府官员下周将在曼谷集会，讨论日益令人关切的全球稻米产量下降趋势问题。
- Based on the production decline method in petroleum reservoir engineering, a new method to predict recoverable and remaining recoverable reserves of oil and gas fields has been proposed in this paper. 基于油气藏工程中的产量递减法,提出了预测油气田可采储量和剩余可采储量的新方法。
- The tong-term tune bests of Pinus yunnanensis management lead to bio-diversity decrease, diseases and insect pests damage, genetic degradation, and productivity decline. 摘要长期以来，云南松的纯林经营使得生物多样性降低、林分稳定性变差、遗传品质退化、林分生产力下降，从而导致生态系统功能衰退。
- What percentage of the earth is covered by oceans? 地球上百分之多少被海水覆盖着？
