RAS for Gas

1. Orientation

RAS 2.0 is a platform that applies gas reservoir dynamic analysis, engineering calculation, production, and pressure forecasting,and diagram development. Therefore, it is suitable for gas reservoir manager and engineer from oil/gas development, Research Institution, and gas production plant.

2. Target

According to gas reservoir engineering theory and natural gas industry standards, it combines experiences with dynamic analysis regulations to build a platform for production and gas reservoir dynamic analysis. Details as follows: 

1)Track gas field/gas well production, current status of exploitation, analyze the reason of production fluctuation and development regulation, evaluate deliverability, make feasible proration plan. 

2)Analyze gas reservoir efficiency, achievement performance, and pressure/production variation. According to the problems arising during the development and production of gas reservoirs so as to make a adjustment scheme.

3)It has several common gas reservoir engineering calculation methods, which can calculate static parameter, recoverable reserves, recovery ratio, gas well deliverability, static pressure of mineshaft and forecast development indicator.

4)Support dynamic and reservoir parameter, verify each other and help engineers to have a deep understanding of gas reservoir.

3. Functions

image 3-1

3.1 Gas Reservoir Overview

It provides the function for static materials upload and look up which include gas reservoir geologic feature, structural feature, reservoir stratum feature, fluid feature, driving type, and thermobaric system. It helps analysts have a deep understanding of gas well and share analysis results with others.

image 3-2 Oil and Gas Reservoir Overview

image 3-3 Gas Field Pressure Gradient Mapping

image 3-4 Gas Reservoir Driving Mode—Water Intrusion Volume coefficient Method

3.2 Production Dynamic analysis

It is mainly analyzed single well production status. Through the well production status to discover the contradictions and problems in production process, and synthesize all types of geological data and dynamic data to analyze the reasons of production fluctuation. It proposes treatment measures to improve single well production status, and analyze the condition of well productivity to propose a reasonable production proration plan, as well as to predict its future production.

image 3-5 Production Alerting Figure

image 3-6 Gas Production History Curve for Single Well

image 3-7 Production Comparison

image 3-8 Well Configuration

image 3-9 Gas Production Profile Chart

image 3-10 Evaluation of single well workover

image 3-11 Deliverability Analysis---IPR Curve

image 3-12 Production performance forecasting

3.3 Gas Reservoir Dynamic Analysis

It is mainly about the research of the whole gas field (block). Through the gas field development status to analyze achievement indicator, evaluate efficiency, and calculate recoverable reserves and recovery ratio. )In addition, it explains why production decreases gradually and makes prediction for future production.    Moreover, it comprehensively systematic analyzes dynamic analysis of gas reservoir, master dynamic fluctuate to provide a reliable basis for production program and fixed deployment next year. 

image 3-13 Gas Field Developing Map

image 3-14 Task Achievement

image 3-15 Single Well Production Comparison

image 3-16 Production Graph

image 3-17 Calculation of Reserves—Water Drive Characteristic Curve

image 3-18 Production Decline Analysis and Prediction--Arps

3.4 Gas Reservoir Engineering Methods and Calculation

It has abundant calculation models and practical analysis methods for gas reservoir engineering, which includes the calculation of static pressure of well bore, multiphase flow, formation water, rock physical property parameter and analysis of liquid carrying ability, natural gas PVT.) In addition, those help researchers’ in-depth study of gas reservoir. 

image 3-19 Static Pressure Calculation

image 3-20 Height Prediction of Gas Well Liquid Loading

image 3-21 Gas Physical Property Parameter

image 3-22 Relative Permeability Curve Normalization

4.Feature

4.1 Improve Analyzing Function

It includes almost all kinds of business in dynamic analysis. It has daily, monthly, yearly production and gas reservoir dynamic analysis to adapt to dynamic analysis for various time and levels.

It provides users with various gas reservoir engineering calculation method and empirical formula to contrasts different results. 

It also provides users with common mapping, report, user-defined curve to extend the range of analysis and rich the content of analysis.

image 4-1 

image 4-2 

4.2 General Analyzing methods

It covers almost all the common calculation methods in gas reservoir engineering, which includes physical property parameter calculation, reserves calculation, recoverable reserves and recovery ratio calculation, indicator prediction, reasonable production calculation, water influx calculation etc. In addition, calculation methods come from theoretical results from both home and abroad, books, industry standard.

4.3 Dynamic and Static State Mapping

It supports geological vector diagram uploading and managing. It can also update the well coordinate information, which is in the database to mapping. Through gas field geological structure graph, which includes alerting graph, contour graph, status graph of exploitation, it shows general status of gas field and single well.


 

image 4-3

4.4 High-efficiency Data structure

o PC Version: Load data in a fast and convenient way, and support off-line working.

o Online Version: Adapt to different database, e.g. development production database, A2 database, SQLServer, Oracle etc. 

o Import data from Excel files.

4.5 Accurate Data Acquisition

t has capabilities to update data both in database and in system immediately, and it helps users understand the latest news from gas field. Therefore, it helps analyst decrease much work from import and selection. 

4.6 Abundant Analyzing Target

It supports common analyzing target (gas field, block, and well) and user-defined target (user-defined unit). Analysts can combine (加key) wells together to do analysis and comparison.

image 4-4 

4.7 Convenient User Experience

o User-defined Analysis Rules;

o Flexible Graph Setting;

o Graph and data linkage, fix data and update without delay;

o Contrastive Analysis( Data, Mapping);

o One-click mapping, provide with map download function;

o Generate PPT.

image 4-5