مدرس هبه منذر شاكر

Researchers commonly employ seismic analyses and fluid-substitution techniques to track subsurface carbon capture storage (CCS) and map the likely distribution of CO₂ within the storage reservoir. The fluid-substitution rock-physics model leverages well-log data and injection-simulation outputs to infer gas distribution, based on a seismic velocity model. This work introduces new insights for making more precise predictions about how CO₂ injection — and subsequent CO₂–brine–rock interactions — alter the geophysical and petrophysical properties of reservoir rocks, which in turn supports earlier detection of potential leaks. Including a dedicated model for CO₂ leakage improves the fidelity of geophysical predictions by simulating how leak-induced changes affect seismic wave speeds, thereby allowing the identification of distinctive velocity anomalies associated with leak zones. By carefully choosing relevant physical parameters — such as fluid saturation, pressure, and gas composition — and tracking their influence on wave propagation, the model offers a more realistic representation of subsurface conditions and strengthens early warning of possible leakage pathways. We developed a complete workflow for rock-physics modelling that combines geological and geophysical interpretations. This includes deriving elastic parameters from measured data, generating synthetic seismic data, and applying fluid-substitution analysis informed by CO₂ injection simulation results. We then apply the Gassmann equation to construct a new post-injection velocity model, incorporating other elastic parameter changes to assess the detection threshold of seismic velocity alterations. Because the Gassmann theory reliably models P-wave velocity in sandstone reservoirs saturated with mixtures of supercritical CO₂ and brine, it enables forecasting how seismic responses vary with different levels of gas saturation. Because acoustic impedance is sensitive to gas saturation changes, observed deviations from expected impedance values may reveal abnormal fluid distributions — potentially indicating zones of CO₂ leakage.

A predictive scheme results from combination of NMR log and core data, introduced to understand the association between most important outputs of the Nuclear Magnetic Resonance (NMR) log data with core data, which is used in the Mishrif Formation from five oil fields in Iraq in Buzurgan, Halfaya, West Qurna, Majnoon, and finally North Rumaila. The oil wells were studied from Buzurgan field (Bu-24, Bu-39, Bu-40, Bu-41, Bu-51). The methods are based on statistical techniques such as multivariate regression to cluster the variables of NMR (as FFI). We combined KCOAT, KSDR and Øe (pivotal properties) with the core data. The study focused on the flow units, storage units. The NMR fingerprint results show some of interactive depth in the permeability and porosity in Majnoon with a correlation. West Qurna and North Rumaila show heterogeneity, whereas Halfaya and Majnoon are more uniform.

During the past decade, the remarkable technology of nuclear magnetic resonance (NMR) logging has improved continually. Oil companies are using NMR measurements for an ever-growing number and range of applications, such as characterizing formation fluids during reservoir evaluation and assessing formation producibility. Besides the conventional well logs, to get a better understanding on flow behavior, the relationship of porosity and permeability of reservoir units, reservoir zonation and flow units were defined, three methods were used (Stratigraphic Flow Profile, Stratigraphic Modified Lorenz Plot and Flow Zone Indicator) and made anew NMR facies classification for the studied interval in seven selected oil wells (Bu-24, Bu-37, Bu-39, Bu-40, Bu-41, Bu-51, Bu-52), the results from these methods used to make the 3D modeling that give the best view of the heterogeneity in the field and led to focused on the best properties in the field in the south anticline and in the north anticline in the wells(Bu-24 and Bu-51) respectively.

Permeability and porosity values regarded as important fundamentals in the petroleum studies and researches especially for the interests in the reservoir topics, many methods and tools were founded for this purpose from time to time. The modern log technology one of this tools but consumes more time and financial possibilities in addition to the experts, such as Nuclear Magnetic Resonance Tools which considered one of the unconventional logs, so that, for this it was necessary to find a method to get the permeability and porosity values for the NMR log by using the conventional logs, note that it has been confirmed the modern studies the high accuracy and reliability for the NMR permeability and NMR porosity. Because the importance of this values , this study deals with the possibility of get these values from the conventional logs with these from NMR log, because of ease dealing with conventional logs and ease of getting it. After making the data analyses and processing this study results that led to putting many transformation formulas which give high correlations to high accuracy applying for this values in the researching and applying aspects and relating with reservoir prediction and modeling which connecting with drilling and producing works. The carbonate Mishrif Fm. In the Buzurgan oil field was selected to achieve this study by chose four oil production wells(Bu-40, Bu-51, Bu-52) in the south and north domes, in the future facilitate the prediction ways for any well has been logged by the open hole logs.

(Lu2, Lu4, Lu8, Lu أجريت الدراسة ل( 241 ) أنموذجا من أللباب الصخري لتكوين الزبير في حقل أللحيس للآبار , 13 وإستحصال نتائج الفحوصات البتروفيزيائية (المسامية والنفاذية)، فضلا عن إجراء فحوصات ،Lu14, Lu19, Lu20) اللباب الخاصة(الضغط الشعيري والنفاذية النسبية) ل( 49 ) إنموذجا. قسم تكوين الزبير(عضو السجيل الأعلى) الى أربع وحدات مكمنية مختلفة الإنتاجية(وحدة مكمنية ذات إنتاجية جيدة جدا، وحدة مكمنية ذات إنتاجية جيدة، وحدة مكمنية ذات إنتاجية متوسطة، وحدة مكمنية ذات إنتاجية ضعيفة) وأظهرت الدراسة تحسن المواصفات البتروفيزيائية المكمنية بإتجاه شمال وغرب الحقل. كما تم تقييم أدائية نظام إزاحة النفط بالماء للوحدتين المكمنيتين(ذات الإنتاجية الجيدة جدا وذات الإنتاجية الجيدة) واللتان تمثلان الوحدتين المكمنيتين الرئيسيتين إذ تبين ان الحاجة لزيادة عمليات الإنتاج ورفع الضغوط المكمنية وتحسين الإستخلاص النفطي بحاجة الى حقن كميات كبيرة من المياه والذي سيؤدي بدوره الى حدوث الخرق المائي المبكر والتي ستعود بجدوى غير إقتصادية في عمليات الإنتاج النفطي.