Hydrocarbon Concentration Regulars and Exploration Techniques Study for Jiyang Depression Stratigraphic Reservoir

论文摘要

It is known that the structure reservoirs,the lithologic reservoirs and thestratigraphic traps grew at continental basins.In the past forties years there were tworespectively structure reservoir and lithologic reservoir which were representative oftwo exploration peaks,among which the stratigraphic traps were found sometimes,and the stratigraphic traps were subtler,more complex formation and more difficultexploration than other two reservoirs.In the earlier exploration the stratigraphic trapswere drilled unsuccessfully because of its unclear forming regulars and lack ofeffective exploration techniques.In recently the reservoiring regulars and explorationtechniques havebeing studied systematically in the help of studying a set oftechniques in the research for stratigraphic traps.The main works are:（1） Collectingabroad and home study results in the research for stratigraphic traps to understand thestudying present and developing trending for finding stratigraphic traps;（2）Processingseismic aiming at finding stratigraphic traps in the ways of high resolution process,pre-time migration and pre-seismic inversion process,the total area in the processedseismic data was over 1500km2,the data interpretation area was over 20000km,400structures maps and analysis maps were completed;（3）The different types of reservoirmodels were built through analyzing 9 structure zones （oil fields） to provide oilenriched regulars concentrated at stratigraphic traps;（4）Variable techniques predictedthe traps were studied to form a serial of techniques to evaluate synthetically thestratigraphic traps.As a result of study three new techniques had been developed.They are asfollow.1.Three orders unconformities by which stratigraphic traps were configured areprovided and five reservoir models are built.The distribution rules for stratigraphic onlap with three orders unconformitiesand traps with unconformities barriers are provided to build five trapping models toshow the oil enrichment regulars for stratigraphic traps.They are considered as onlap traps formed at Upper Tertiary that the traps are“growing in sags and steep slopes andonlap flutings,migrating vertically firstly and horizontally secondly for long distance,sealing by stratigraphic and shale and heavy oil,controlled by palaeogeomorphology.”They are considered as barriers traps formed at Upper Tertiary,which are“growing insags and gentle slopes and low bulges,contacted diagonally with Down Tertiary at NgGroup,migrating upper along the horizons,sealed by heavy ail and shale.”Those areconsidered as subcrop traps formed at ante-Tertiary,which are“growing at subcropwhich uplifted source rocks,its physical property are better in fracture or Karst,oilmigrating in multi-way,it is important to find nose-structure background.”There aretwo levels trapping models within source rocks,they are“traps with shale overlaidsand which configured within oil rocks,sandstone and mudstone had poor pressuredischarged,the hydrocarbon filled into fracture driven by pressure discharged,trapswith shale overlaid sand which configured at the margin at box,”and there are alsotwo orders trapping models outside source rocks,which are“structural nose at slopein subsag,they were configured either upper or down of beach and bar or low delta,the oil migrates through faulted-sand”.2.Three methods and two approaches are created to be used to describetruncation edge of stratigraphic trapsThe three methods,which are geostatistics,angle extrapolation and propertyprocess,are developed to describe stratigraphic truncation line,the depositionalpinchout is described by waveforms analysis and prestack inversion to predictstratigraphic traps quantitatively.3 Six steps processes built to evaluate comprehensively stratigraphic trap.The six steps are:building sequence framework in high resolution,dividingdifferent study zone by structure analyzing,defining targets by different orderunconformity,finding pool at deposit zone,describing trap by composite“three lines”,analyzing interesting targets,which can be used to evaluated different typicalstratigraphic trap to deploy drilling sites.The methods,such as strata onlap or denudation interface description,reservoirdescription and“six steps”approach,are developed to quantify strata traps to recognize the strata traps property,by which the traps grew at Zhanche area,Dongying sag and Chengdao area are studied and their trapping conditions and oilenrichment regulars are summed.As a result we have got breakthroughs andimprovements in oil fields of Chenjiazhuang,Taiping,Wangzhuang-Ninghai,Linfanjia,Gaoqing,Shanjiashi,Bamianhe,east slope of Chengdao and north slope ofChengdao.Interesting trap area is predicted to be 311.8km2,original oil and gasreserves is predicted to be 152.4×104t.The better economic benefit has bee got.

论文目录

• Abstract
• 1 Introduction
• 1.1 Project Foundation and Significance
• 1.2 Present Situation of Research Home and Abroad
• 1.2.1 Present Situation of Research and Development Tendency Abroad
• 1.2.2 Stratigraphic Hydrocarbon Reservoir Classification and Features
• 1.3 Research Content and Technique Course
• 1.3.1 Research Content
• 1.3.2 Technique Course
• 1.4 Major Research Result and Innovation
• 2 Stratigraphic Trapping Mechanism and Enrichment Regulars
• 2.1 Three Orders Unconformities
• 2.1.1 Characteristics and Size
• 2.1.2 The Relationship Between Three Orders Unconformity and Stratigraphic Traps Distribution
• 2.1.3 Seismic Identification of The Unconformities
• 2.2 Efficiency Analysis and Trapping Models for Stratigraphic Trap
• 2.2.1 Efficiency Analysis
• 2.2.2 Trapping Models
• 2.3 Hydrocarbon Concentrating Rules for the Three Orders nconformities Stratigraphic Traps
• 2.3.1 Enrichment Rules for the First Order Unconformity Traps
• 2.3.2 Strata Reservoirs and Its Banking Regulars Relative with the Secondary and Third Orders Unconformities
• 3 Techniques Exploring Stratigraphic Reservoirs
• 3.1 Seismic Data Processing Techniques Aiming at Stratigraphic Reservoir
• 3.1.1 Techniques for Data Integrated Processing
• 3.1.2 Technique for Pre-Stacked Process
• 3.1.3 High Resolution Process Technique
• 3.2 Seismic Identification and Classification for Stratigraphic Trap
• 3.2.1 Seismic Identification
• 3.2.2 Stratigraphic Classification
• 3.3 The Techniques Determining Stratigraphic Overlapping and Denudating Boundary
• 3.3.1 Property Parameters Half-Quantity Prediction
• 3.3.2 Geology Statistics Prediction in Quantity
• 3.3.3 Stratigraphic Included Angle Extrapolation in Quantity Method
• 3.4 The Techniques Predicting Stratigraphic Traps Reservoir and Seal Related with the First Order Unconformity
• 3.4.1 Techniques Describing Neocene Stratigraphic Traps
• 3.4.2 Techniques Describing Stratigraphic Unconformity Traps at Pre-Tertiary
• 3.5 Techniques Predicting Stratigraphic Traps Related to the Secondary Order and the Third Order Unconformities
• 3.6 The Technique for Stratigraphic Hydrocarbon Reservoir "Six Steps" Integrated Evaluation
• 3.6.1 High Precision Sequence Building Framework
• 3.6.2 Structure Analysis Dividing Areal Belt
• 3.6.3 Unconformity Form Ascertaining Target,
• 3.6.4 "Three Lines" Combination Describing Trap
• 3.6.5 Precipitation Facie Belt Discovering Reservoir,
• 3.6.6 Integrated Analysis Choosing Target
• 3.7 Summary
• 4 Exploration Effect and Potentiality Analysis for Stratigraphic Hydrocarbon Reservoir
• 4.1 Exploration Effect and Cases
• 4.1.1 Exploration Effect
• 4.1.2 Circumstances for Typical Area Deliverability
• 4.1.3 The Stratigraphic Hydrocarbon Exploration Cases Related to the First Order Unconformity
• 4.1.4 Stratigraphic Hydrocarbon Reservoir Exploration Cases Related to the Secondary Order and Third Order Unconformity
• 4.2 Potentiality Analysis for Stratigraphic Reservoir
• 4.2.1 Potentiality Analysis for Stratigraphic Reservoir Related to the First Order Unconformity
• 4.2.2 Potentiality Analysis for the Stratigraphic Reservoir Related to the Secondary Order and the Third Order Unconformity
• 5 Conclusions and Suggestion
• 5.1 Conclusions
• 5.2 Suggestion
• Acknowledgment
• Reference