tag:blogger.com,1999:blog-51787998500776155692024-03-05T18:06:53.401+07:00Seismic InversionIn Seismic oil and gas , seismic acoustic impedance , the workflows for utilizing seismic data inverted to acoustic impedance data in reservoir characterization will be shown. We are using the public domain 3D seismic dataset at Boonsville Field in North-Central Texas for our example.Unknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-5178799850077615569.post-32946778586139438332008-07-16T12:55:00.002+07:002008-12-10T21:53:28.581+07:00Seismic AII<div align="center"><br /><strong><span style="font-size:130%;">Seismic Acoustic Impedance Inversion in<br />Reservoir Characterization Utilizing <span class="blsp-spelling-error" id="SPELLING_ERROR_0">gOcad</span><br /></span></strong></div><div align="center"><strong><span style="font-size:130%;"></div></span></strong><div align="center"><strong><span style="font-size:78%;"><em>By Steven <span class="blsp-spelling-error" id="SPELLING_ERROR_1">Clawson</span> and <span class="blsp-spelling-error" id="SPELLING_ERROR_2">Hai</span>-<span class="blsp-spelling-error" id="SPELLING_ERROR_3">Zui</span> (“<span class="blsp-spelling-error" id="SPELLING_ERROR_4">Hai</span>-Ray”) <span class="blsp-spelling-error" id="SPELLING_ERROR_5">Meng</span>, <span class="blsp-spelling-error" id="SPELLING_ERROR_6">iReservoir</span>.com<br />Presented at the 2000 <span class="blsp-spelling-error" id="SPELLING_ERROR_7">gOcad</span> Users Meeting</em></span></strong></div><div align="center"><strong><span style="font-size:78%;"></div></span></strong><div align="justify"><span style="font-size:78%;"></span></div><div align="justify"><span style="font-size:78%;"></span></div><div align="justify"><strong>Introduction</strong></div><div align="justify"><br /><span class="blsp-spelling-error" id="SPELLING_ERROR_8">In Seismic oil and gas , the workflows</span> for utilizing seismic data inverted to acoustic impedance data in reservoir characterization will be shown. We are using the public domain 3D seismic <span class="blsp-spelling-error" id="SPELLING_ERROR_9">dataset</span> at <span class="blsp-spelling-error" id="SPELLING_ERROR_10">Boonsville</span> Field in North-Central Texas for our example. This public domain <span class="blsp-spelling-error" id="SPELLING_ERROR_11">dataset</span> is fairly complete with seismic, well, and production data:<br />•5.5 sq. Miles of 3D seismic data<br />•Vertical seismic profile (<span class="blsp-spelling-error" id="SPELLING_ERROR_12">VSP</span>) near center of survey<br />•Digital well logs from 38 wells<br />•Well markers for the bend conglomerate group<br />•Perforations, reservoir pressures, production and <span class="blsp-spelling-error" id="SPELLING_ERROR_13">Petrophysical</span> data for the 38<br />wells<br />We acknowledge <span class="blsp-spelling-error" id="SPELLING_ERROR_14">Oxy</span> USA, Inc., <span class="blsp-spelling-error" id="SPELLING_ERROR_15">Enserch</span>, Arch Petroleum, Bureau of Economic<br />Geology, <span class="blsp-spelling-error" id="SPELLING_ERROR_16">GRI</span> and the DOE as contributing members for making this <span class="blsp-spelling-error" id="SPELLING_ERROR_17">dataset</span> available.<br />This data is made publicly available as part of the technology transfer activities of the Secondary Gas Recovery (<span class="blsp-spelling-error" id="SPELLING_ERROR_18">SGR</span>) program funded by the U. S. Department of Energy and the Gas Research Institute. </div><div align="justify"></div><div align="justify"></div><div align="justify">This 2<span class="blsp-spelling-error" id="SPELLING_ERROR_19">nd</span> iteration of inversion shows the transformation of the seismic amplitudes to rock properties.</div><div align="justify"></div><p><br /></p><p><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYfyOusUzZB1j24yAJF114lPxmQWX2d6YFYfNDYxfNNl2Z3s3wH4SYQD4L37xxguX7RnINnDIiwU-WipWCOnMiaFJlfJkT4CgR7EgSGNP6p_MH24hKCP0TP_OG2iddCd_0QhO6-nPVX18G/s1600-h/pic8.gif"><img id="BLOGGER_PHOTO_ID_5223498760773360994" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYfyOusUzZB1j24yAJF114lPxmQWX2d6YFYfNDYxfNNl2Z3s3wH4SYQD4L37xxguX7RnINnDIiwU-WipWCOnMiaFJlfJkT4CgR7EgSGNP6p_MH24hKCP0TP_OG2iddCd_0QhO6-nPVX18G/s400/pic8.gif" border="0" /></a></p><p></p><p>Qualitative correlation to the key well: B Yates 18D yields similar results as before.<br /><br /></p><p><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2ePHwFXk9vYeaNi_Y8wJGet_flIq_LPYUSwPSWMgJCWZGszA1BlCx2wlp-SVNd-mtUDT5KifRbu92HCMYGEDdio8b4t5dYsJQ_2RSqL1kfTsH6sbrw95q0QjUF232LbsFhKDr5TX7D_Zj/s1600-h/pic7.gif"><img id="BLOGGER_PHOTO_ID_5223496681802381186" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2ePHwFXk9vYeaNi_Y8wJGet_flIq_LPYUSwPSWMgJCWZGszA1BlCx2wlp-SVNd-mtUDT5KifRbu92HCMYGEDdio8b4t5dYsJQ_2RSqL1kfTsH6sbrw95q0QjUF232LbsFhKDr5TX7D_Zj/s400/pic7.gif" border="0" /></a> </p><p><br />Now cross-plotting the seismically derived acoustic impedance and the log properties in<br />depth shows a better correlation. These correlations are good enough to use in a <span class="blsp-spelling-error" id="SPELLING_ERROR_20">colocated</span><br />co-<span class="blsp-spelling-error" id="SPELLING_ERROR_21">Kriging</span> of the well log properties. </p><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkoyrfQPR5CFCVxeIW_ZmRc6KJ-tjLe8bkmoYxPXUWuVFnakzopNt0FeiQuWBIR_5xaJGw9uF3nk5v1puhVifXQocNmzf67M72r8XWHbIxgP8ucxl_a_4-0tTNSZmBjxlE2OSEmTiqoNdN/s1600-h/pic6.gif"><img id="BLOGGER_PHOTO_ID_5223495908200033170" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkoyrfQPR5CFCVxeIW_ZmRc6KJ-tjLe8bkmoYxPXUWuVFnakzopNt0FeiQuWBIR_5xaJGw9uF3nk5v1puhVifXQocNmzf67M72r8XWHbIxgP8ucxl_a_4-0tTNSZmBjxlE2OSEmTiqoNdN/s400/pic6.gif" border="0" /></a><br /><br /><br /><br /><p></p>Rock property models are now generated by co-located co-<span class="blsp-spelling-error" id="SPELLING_ERROR_22">Kriging</span> of the gamma ray logs<br />for lithology discrimination and resistivity logs controlled by the seismically derived AI<br />properties<br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7X4xQuihF4dFwSTH8ISHiPRVZlHmaD57PwEyNGcBhuR4nr0PuCrNvOCSUe75VuhhtPfZurOBfomeTmUcCA7gjUFDPN82-h4HE3c71ZZelVyimDQAffcIDnofrYdLJCIwxKiO4GzFc6wkC/s1600-h/pic5.gif"><img id="BLOGGER_PHOTO_ID_5223494710990120802" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7X4xQuihF4dFwSTH8ISHiPRVZlHmaD57PwEyNGcBhuR4nr0PuCrNvOCSUe75VuhhtPfZurOBfomeTmUcCA7gjUFDPN82-h4HE3c71ZZelVyimDQAffcIDnofrYdLJCIwxKiO4GzFc6wkC/s400/pic5.gif" border="0" /></a><br /><br /><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbPLWjuA3YFcoSyjIHyq5v4DuTHWhaXpWXXV9_tTKyQw1ukjx1teFMk-c79Nipqe7rCit8xgmVR0y5G1TNScWgFstutZ-XK3-_OqvKmVsHYumkiNOqmbE1_85ER4cgdop4pwguSgbfOedn/s1600-h/pic4.gif"><img id="BLOGGER_PHOTO_ID_5223493859669045474" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbPLWjuA3YFcoSyjIHyq5v4DuTHWhaXpWXXV9_tTKyQw1ukjx1teFMk-c79Nipqe7rCit8xgmVR0y5G1TNScWgFstutZ-XK3-_OqvKmVsHYumkiNOqmbE1_85ER4cgdop4pwguSgbfOedn/s400/pic4.gif" border="0" /></a><br /><br /><div><div><div><div>A reservoir model of sandstone porosity can be derived by the relationships of lithology<br />to gamma ray and resistivity. Where these models of gamma ray and resistivity are<br />related back to the seismically derived acoustic impedance.<br /></div><br /><div></div><img id="BLOGGER_PHOTO_ID_5223492800089623426" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1ZOXLFZL9WLceYUcXxDRRVeiMFDF6dyeCYFah9NB9fvZIZrhyphenhyphenQp_CZz-1h2mlz2Q6HyCw0Y6LWOWstqXOy_XpnmljTBRkAhe3UrLoFDq93okopdHB1AkmOJmxA-Zr5oR_L8Frc1blEBsT/s400/pic3.gif" border="0" /><br /><br /><div>By segmenting the data into a sandstone region defined by where:<br />Gamma ray is less than 90 and<br />Log10(Resistivity) is greater than 0.8<br />A sandstone porosity relationship is defined.<br /></div><br /><div></div><img id="BLOGGER_PHOTO_ID_5223491956863104130" style="DISPLAY: block; MARGIN: 0px auto 10px; CURSOR: hand; TEXT-ALIGN: center" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjWlFkWthaiDN57SvokEpI81Q-T23F7xzIvJZ_1W1iadPrw1G3ZyHncHKAm8laX68Zv_N0gqZDygULiooiidQKQ0BsHqm7LgUE-X48V9_zuGmInBCAy24RiFreAyuGF9XDwPh-bBaFoT9Cq/s400/pic2.gif" border="0" /><br /><br /><div>Constructing the density model in the sandstone <span class="blsp-spelling-error" id="SPELLING_ERROR_23">facies</span> then is represented here.</div><p><img id="BLOGGER_PHOTO_ID_5223489721875163186" style="DISPLAY: block; MARGIN: 0px auto 10px; WIDTH: 390px; CURSOR: hand; HEIGHT: 264px; TEXT-ALIGN: center" height="249" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhe9YYfWbBn0qjsNWPMavX8QllT3txV0eFKzHnNDmIwaYWI69iorcPl7K0FeyLX6jzZjMpdltKVHZmrt-U_bl5fgA4h7DogjqG8smu7zCURA3OOMWGsJRgSxe7bfhcoCBVa84jUNLiyCPw0/s320/pic1.jpg" width="333" border="0" /></p></div></div></div></div>Unknownnoreply@blogger.com0